Easy Crock Pot Pepper Steak Recipe – Tender Beef with Bell Peppers

This Crock Pot Pepper Steak is an easy, hearty dinner featuring tender strips of flank steak, colorful bell peppers, sweet onion, garlic, and a rich, savory sauce that comes together beautifully in the slow cooker. With its combination of tender beef, silky thickened sauce, crisp-tender vegetables, and comforting flavors, this Crock Pot Pepper Steak is perfect for busy families, beginner cooks, and anyone looking for an easy slow cooker beef dinner. Serve it hot over fluffy cooked white rice or egg noodles for a satisfying weeknight meal. If you love easy crock pot dinners, slow cooker pepper steak, tender beef with bell peppers, easy beef and rice recipes, or family-friendly slow cooker meals, this recipe deserves a spot in your regular dinner rotation. The long, gentle cooking time gives the beef a wonderfully tender texture while the soy sauce, beef broth, tomato paste, garlic, brown sugar, and sesame oil create a deeply savory finish.

Introduction

There is something especially comforting about coming home to a dinner that has been slowly cooking away in the Crock Pot. The kitchen smells inviting, the beef is tender, and the vegetables have cooked alongside a rich sauce that is ready to spoon over rice or noodles.

That is exactly what makes Crock Pot Pepper Steak such a useful recipe for busy households.

Pepper steak is a classic combination for a reason. Tender beef and colorful bell peppers work beautifully together, while onion and garlic add an aromatic foundation. In this slow cooker version, those familiar ingredients are brought together with low sodium soy sauce, beef broth, tomato paste, brown sugar, black pepper, and sesame oil.

The result is a comforting main dish with plenty of savory flavor and a sauce that becomes thick, glossy, and satisfying after the cornstarch slurry is added near the end of cooking.

This recipe is also wonderfully practical. The prep takes just 15 minutes, and the slow cooker handles the long cooking portion. That makes it especially appealing for a weeknight when you want a homemade dinner without having to spend hours standing at the stove.

Serve the finished beef and peppers over cooked white rice or egg noodles, and you have a complete-feeling family dinner that is hearty enough to satisfy a crowd.

Why You’ll Love This Recipe

• Easy preparation: The ingredients are assembled directly in a 5-6 quart slow cooker, making the process straightforward and beginner-friendly.
• Tender beef: Thinly sliced flank steak cooks slowly until very tender.
• Colorful vegetables: Green, red, and yellow bell peppers add color, texture, and natural sweetness.
• Rich savory sauce: Soy sauce, beef broth, tomato paste, garlic, brown sugar, and black pepper create a balanced sauce.
• Family-friendly: Served over rice or egg noodles, this is a comforting meal that works well for family dinners.
• Convenient timing: With just 15 minutes of prep and a long slow-cooking period, it fits easily into a busy day.

Ingredients Breakdown

This recipe makes 6 servings and is designed for a 5-6 quart slow cooker.

Beef

2 lbs flank steak, sliced thinly against the grain into ¼-inch strips

Flank steak provides the hearty beef component of the dish. Slicing it thinly against the grain helps create a more tender bite after slow cooking.

Vegetables and Aromatics

1 medium yellow onion, sliced

The onion adds savory depth and becomes tender during the slow cooking process.

1 medium green bell pepper, sliced into strips

Green bell pepper contributes a fresh vegetal flavor and adds beautiful color.

1 medium red bell pepper, sliced into strips

Red bell pepper brings a naturally sweet flavor and vibrant color.

1 medium yellow bell pepper, sliced into strips

Yellow bell pepper adds another layer of sweetness and color to the finished dish.

4 cloves garlic, minced

Garlic provides a fragrant savory foundation for the sauce.

Sauce Ingredients

⅓ cup low sodium soy sauce

Soy sauce supplies the salty, savory backbone of the sauce.

½ cup low sodium beef broth

Beef broth helps create the sauce while reinforcing the beef flavor.

2 tablespoons tomato paste

Tomato paste adds richness, body, and concentrated savory flavor.

1 tablespoon brown sugar

Brown sugar provides a subtle sweetness that balances the savory ingredients.

½ teaspoon black pepper

Black pepper adds gentle warmth and seasoning.

½ teaspoon salt

Salt seasons the flank steak and contributes to the overall flavor.

1 teaspoon sesame oil

Sesame oil is added just before serving, giving the finished sauce a distinctive aromatic finish.

Thickening Ingredients

3 tablespoons cornstarch

Cornstarch thickens the slow cooker sauce near the end of cooking.

3 tablespoons cold water

Cold water is whisked with the cornstarch to create a smooth slurry.

For Serving

Cooked white rice or egg noodles, for serving

Rice or egg noodles provide a comforting base for the tender beef, peppers, onions, and thickened sauce.

Tools & Equipment Needed

You only need a few basic pieces of equipment to prepare Crock Pot Pepper Steak:

• 5-6 quart slow cooker
• Small bowl
• Whisk
• Cutting board
• Sharp knife
• Measuring cups
• Measuring spoons
• Serving spoon or tongs

A sharp knife is particularly helpful for cutting the flank steak into thin ¼-inch strips and slicing the vegetables evenly.

Step-by-Step Instructions

1. Prepare the slow cooker sauce

In the insert of a 5-6 quart slow cooker, whisk together the ⅓ cup low sodium soy sauce, ½ cup low sodium beef broth, 2 tablespoons tomato paste, 1 tablespoon brown sugar, 4 cloves minced garlic, and ½ teaspoon black pepper until fully combined.

The mixture should look evenly blended, with the tomato paste incorporated into the liquid.

2. Season the flank steak

Season the 2 lbs flank steak, sliced thinly against the grain into ¼-inch strips, with the ½ teaspoon salt and additional black pepper as specified in the method.

Add the seasoned steak to the slow cooker.

Toss the beef thoroughly so the strips are coated well in the sauce mixture.

3. Add the vegetables

Place the 1 medium sliced yellow onion, 1 medium green bell pepper sliced into strips, 1 medium red bell pepper sliced into strips, and 1 medium yellow bell pepper sliced into strips on top of the beef.

Do not stir.

Keeping the vegetables on top at this stage follows the original cooking method and allows everything to cook together during the slow-cooking period.

4. Slow cook the beef

Cover the slow cooker and cook on LOW for 6-8 hours, until the beef is very tender.

The extended cooking time allows the flank steak to become tender while the peppers and onion soften and contribute their flavors to the sauce.

5. Make the cornstarch slurry

About 20-30 minutes before serving, whisk together 3 tablespoons cornstarch and 3 tablespoons cold water in a small bowl.

Whisk until the mixture is completely smooth, with no visible lumps.

6. Thicken the sauce

Pour the smooth cornstarch mixture into the slow cooker.

Stir gently to combine.

Switch the slow cooker to HIGH, cover, and cook for an additional 20-30 minutes, until the sauce has thickened.

The finished sauce should have a noticeably thicker consistency that coats the beef and vegetables.

7. Add the sesame oil

Just before serving, stir in 1 teaspoon sesame oil.

Taste the sauce and adjust seasoning as needed.

8. Serve

Serve the Crock Pot Pepper Steak hot over cooked white rice or egg noodles.

Spoon plenty of the tender beef, colorful peppers, onions, and thickened sauce over the rice or noodles so every serving gets a good balance of meat, vegetables, and sauce.

Tips & Variations

The original recipe should be prepared exactly as written above. The ideas below are optional serving or adaptation concepts and are not changes to the original recipe.

Vegetarian Option

The original recipe is centered around flank steak, so a vegetarian version would require a different recipe structure and ingredient quantities. For that reason, the original recipe should not be presented as vegetarian.

If preparing a separate vegetarian interpretation, the beef and beef broth would need to be replaced with suitable plant-based ingredients, but that would constitute a different recipe.

Gluten-Free Option

For a gluten-free preparation, the important consideration is the soy sauce. Use a certified gluten-free soy sauce or another gluten-free alternative that is appropriate for your dietary needs.

This should be treated as an ingredient substitution for dietary purposes rather than a modification to the original recipe.

Dairy-Free Option

The listed recipe contains no dairy ingredients, making the original ingredient list dairy-free.

Always check the labels of packaged ingredients if you are cooking for someone with a dairy allergy or strict dietary requirement.

Spice Level

The original recipe uses black pepper for seasoning but does not contain a dedicated hot pepper ingredient. For the original recipe, follow the listed quantities exactly.

If you are preparing a separate variation, additional heat could be introduced, but that would create a variation rather than the original recipe.

Pantry Substitutions

The recipe already uses practical pantry staples including soy sauce, beef broth, tomato paste, brown sugar, cornstarch, and sesame oil.

For the most accurate version, use the ingredients exactly as listed.

Seasonal Variations

The colorful bell peppers make this dish naturally attractive throughout the year. A seasonal variation can focus on the presentation rather than changing the original recipe.

For example, serve the finished beef and vegetables in a deep bowl during colder months for a cozy presentation, or use a wide serving platter for a casual family-style meal.

Flavor Profile

The flavor of Crock Pot Pepper Steak is deeply savory with a gentle balance of sweetness and aromatic richness.

The low sodium soy sauce provides the familiar savory foundation, while beef broth reinforces the hearty beef flavor. Tomato paste adds concentrated depth, giving the sauce a richer character than a simple broth-based mixture.

Brown sugar brings a subtle sweetness that works particularly well with the savory soy sauce and beef.

Garlic adds fragrance, while black pepper contributes a mild warmth.

The bell peppers bring a natural sweetness and fresh vegetable flavor. Because they cook slowly with the beef, their flavor becomes integrated into the sauce rather than remaining separate from it.

Then comes the sesame oil at the very end. Added just before serving, it gives the dish an aromatic finish without needing to cook for hours.

Texture is equally important. The flank steak becomes very tender, while the vegetables soften during the slow cooking process. The cornstarch slurry transforms the cooking liquid into a thicker sauce that coats the beef and vegetables beautifully.

Served over white rice or egg noodles, the contrast between the tender beef, soft vegetables, thick savory sauce, and comforting starch creates a satisfying meal.

Nutritional Overview

The provided recipe lists the following nutrition per serving:

• Calories: 318 kcal
• Protein: 36g
• Carbohydrates: 14g
• Fat: 12g
• Fiber: 2g

Additional listed nutritional information includes 4g saturated fat, 1g polyunsaturated fat, 5g monounsaturated fat, 91mg cholesterol, 642mg sodium, 724mg potassium, 6g sugar, 1240 IU vitamin A, 98mg vitamin C, 42mg calcium, and 3mg iron per serving.

Because the recipe is served with cooked white rice or egg noodles, the nutrition listed in the original recipe should be understood as the recipe’s stated nutritional information rather than an independent calculation of every possible serving combination.

Make-Ahead & Meal Prep Tips

One of the biggest advantages of this recipe is that most of the cooking happens in the slow cooker.

Before Cooking

The steak and vegetables can be prepared according to the recipe before starting the slow cooker. The beef can be sliced against the grain into the required ¼-inch strips, while the onion and peppers can be sliced.

The sauce ingredients can also be measured before cooking.

However, follow the original method when assembling the slow cooker, particularly the instruction to place the sliced bell peppers and onion on top of the beef without stirring.

During Cooking

The recipe cooks on LOW for 6-8 hours, followed by the final thickening stage.

The cornstarch slurry should be prepared approximately 20-30 minutes before serving, rather than added at the beginning.

After Cooking

Leftovers should be transferred to an airtight container and stored in the refrigerator for up to 3 days, according to the provided recipe notes.

Allow refrigerated leftovers to cool and store them promptly and properly.

When reheating, warm the portion gently until hot throughout. If the sauce has thickened further after refrigeration, gentle reheating can help loosen it.

FAQs

Can I use a different cut of beef?

The original recipe specifically calls for 2 lbs flank steak, sliced thinly against the grain into ¼-inch strips. For the most accurate preparation, use the specified cut.

Why do the vegetables go on top of the beef?

The method specifically instructs you to place the sliced bell peppers and onion on top of the beef and not stir before cooking. Following the stated layering method keeps the preparation consistent with the original recipe.

When should I add the cornstarch?

Add the cornstarch slurry about 20-30 minutes before serving. Whisk 3 tablespoons cornstarch with 3 tablespoons cold water until completely smooth, then pour it into the slow cooker and stir gently.

Why is the slow cooker switched to HIGH at the end?

The recipe calls for switching the slow cooker to HIGH after adding the cornstarch slurry and cooking for an additional 20-30 minutes. This final stage is used to thicken the sauce.

Can I serve this with something other than rice?

Yes. The recipe specifically gives two serving options: cooked white rice or egg noodles.

How long can leftovers be frozen?

According to the provided recipe notes, leftovers can be frozen for up to 3 months. Allow the food to cool completely before freezing.

Cooking Timeline

Cooking Stage	Time
Prep Time	15 minutes
Cook Time	7 hours
Total Time	7 hours 15 minutes
Servings	6

The listed cook time of 7 hours represents the stated recipe timing, while the method provides a LOW cooking range of 6-8 hours, followed by the final 20-30 minute thickening stage.

Serving Suggestions

The simplest way to serve Crock Pot Pepper Steak is over a bed of cooked white rice.

Spoon the rice into individual bowls or onto plates, then top with the tender beef and colorful peppers. Finish with plenty of the thickened sauce so it can soak into the rice.

Egg noodles are another option specified by the original recipe. Their soft, comforting texture works particularly well with the rich sauce.

For a family-style dinner, transfer the finished pepper steak to a serving dish and let everyone spoon portions over their preferred base.

For a more polished presentation, arrange the beef and colorful peppers so that the green, red, and yellow peppers are visible on top. This makes the finished dish look vibrant and inviting without requiring complicated garnishes.

Recipe Variations

The original recipe is already complete as written. These ideas are best treated as separate remixes rather than changes to the recipe.

Pepper Steak Rice Bowls

Use the original Crock Pot Pepper Steak and serve generous portions over cooked white rice. Build each bowl with rice on the bottom, followed by beef and vegetables, then spoon the thickened sauce over everything.

Pepper Steak Noodle Bowls

Serve the original recipe over egg noodles instead of white rice, using the serving option provided in the recipe.

Family-Style Pepper Steak

Prepare the recipe exactly as written, then transfer the finished beef and vegetables to a large serving dish. Place the rice or egg noodles alongside it and allow everyone to assemble their own serving.

Extra-Saucy Serving Style

For a sauce-forward presentation, spoon the beef and vegetables over the serving base first and then distribute the remaining thickened sauce evenly across the portions.

Ingredient Spotlight

Flank Steak

Flank steak is the star of this dish.

Because the recipe calls for the steak to be sliced thinly against the grain into ¼-inch strips, careful slicing is an important part of the preparation.

When cutting flank steak, look for the visible direction of the muscle fibers. Cutting across those fibers rather than along them creates shorter pieces of muscle, which helps produce a more pleasant bite.

The slow cooking then takes over, allowing the beef to become very tender.

Bell Peppers

The combination of green, red, and yellow bell peppers gives the recipe its signature colorful appearance.

The different colors also bring slightly different flavor characteristics. Red and yellow peppers tend to contribute a sweeter flavor, while green peppers provide a more pronounced vegetal note.

Keeping all three colors in the recipe makes the finished dish visually appealing as well as flavorful.

Store fresh bell peppers in the refrigerator until ready to use. Before slicing, inspect them for firmness and remove any damaged areas.

Pro Cooking Tips

Slice the beef against the grain

This is one of the most important preparation details in the recipe. The flank steak should be sliced thinly against the grain into ¼-inch strips.

Keep the vegetable layer intact

The method specifically says to place the bell peppers and onion on top of the beef and do not stir.

Follow this instruction rather than mixing everything together at this stage.

Make the slurry smooth

The cornstarch and cold water should be whisked together until completely smooth before being added to the slow cooker.

This helps prevent lumps from forming in the sauce.

Add the sesame oil at the end

The recipe specifically calls for 1 teaspoon sesame oil just before serving.

This timing gives the finished dish its aromatic sesame character.

Pay attention to the final texture

The goal during the final 20-30 minutes is a sauce that has thickened. Watch the consistency as the dish finishes so the sauce reaches the texture described in the original method.

Present the colors

Green, red, and yellow peppers naturally create an attractive plate. When serving, arrange some of the peppers where their colors remain visible instead of hiding everything beneath the beef.

Storage & Freezing Guide

Refrigerator

According to the recipe notes, store leftovers in an airtight container in the refrigerator for up to 3 days.

For best quality, transfer leftovers into the container once they have cooled appropriately and keep them refrigerated.

Freezer

The provided recipe notes state that leftovers can be frozen for up to 3 months.

Allow the food to cool completely before freezing.

Airtight freezer-safe storage is important to help protect the quality of the leftovers.

Reheating

Reheat leftovers gently until hot throughout.

Because the sauce contains cornstarch, it may become thicker after refrigeration or freezing. Gentle reheating can help return it to a more spoonable consistency.

What Not to Freeze

The recipe does not specify any particular component that must not be frozen. The provided notes specifically state that leftovers can be frozen for up to 3 months.

For the best results, store the cooked pepper steak in an airtight container and follow the cooling and storage instructions.

Nutrition Estimate Table

The following table reproduces the nutrition information provided with the recipe.

Nutrient	Amount Per Serving
Calories	318 kcal
Protein	36g
Carbs	14g
Fat	12g
Fiber	2g

Additional nutrition per serving:

Nutrient	Amount
Saturated Fat	4g
Polyunsaturated Fat	1g
Monounsaturated Fat	5g
Cholesterol	91mg
Sodium	642mg
Potassium	724mg
Sugar	6g
Vitamin A	1240 IU
Vitamin C	98mg
Calcium	42mg
Iron	3mg

Dietary Notes

The original recipe contains beef and soy sauce and is not vegetarian.

It contains no listed dairy ingredients and is therefore dairy-free based on the provided ingredient list. The soy sauce means the recipe should not automatically be considered gluten-free unless a gluten-free soy sauce or suitable alternative is used.

The recipe also contains no listed nuts.

For lower sodium, the provided notes recommend using low or no sodium beef broth and low sodium soy sauce. The notes also mention coconut aminos as an alternative to soy sauce, although this would change the ingredient from the original recipe.

Why This Crock Pot Dinner Works So Well

There is a special appeal to recipes that give you a satisfying homemade meal without requiring constant attention.

Crock Pot Pepper Steak checks that box beautifully.

The beef, sauce, and vegetables all cook together over a long period, creating layers of savory flavor. The bell peppers bring color and natural sweetness, while onion and garlic deepen the aroma.

The sauce gets its character from a combination of soy sauce, beef broth, tomato paste, brown sugar, and black pepper. None of those ingredients needs to dominate. Instead, they work together to create the rich, savory flavor associated with classic pepper steak.

The final cornstarch slurry is another important detail. Rather than relying on a thin cooking liquid, the recipe finishes with a thicker sauce that clings to the beef and vegetables.

Then the sesame oil is stirred in right before serving, adding a fragrant final note.

And because everything is served over white rice or egg noodles, the finished dish feels complete and comforting.

How to Make This a Weeknight Favorite

A little preparation can make this recipe especially convenient.

Before beginning, have the flank steak sliced into the required thin strips and prepare the onion, bell peppers, and garlic.

Measure the sauce ingredients so everything is ready when you begin assembling the slow cooker.

Once the slow cooker is cooking on LOW, you have a long stretch of time before the final thickening stage. About 20-30 minutes before serving, prepare the cornstarch slurry and complete the final cooking step.

Then cook the rice or egg noodles for serving according to their own package or preparation instructions.

The result is a dinner that feels much more involved than the actual hands-on preparation suggests.

Expanded Conclusion

If you’re looking for a comforting slow cooker dinner that combines tender beef, colorful vegetables, and a rich savory sauce, Crock Pot Pepper Steak is a wonderful recipe to keep close at hand.

It brings together everything that makes a good family dinner appealing: simple preparation, hearty ingredients, satisfying texture, and plenty of flavor. The flank steak becomes very tender during the slow cooking process, while the green, red, and yellow bell peppers add color and sweetness.

The sauce is where all those elements come together. Soy sauce and beef broth provide savory depth, tomato paste adds richness, brown sugar brings balance, garlic and black pepper build the flavor, and sesame oil gives the finished dish an aromatic final touch.

Served over cooked white rice or egg noodles, it becomes the kind of meal that is easy to imagine making again and again.

Whether you’re preparing dinner for your family, looking for a dependable weeknight slow cooker meal, or simply craving tender beef and peppers in a comforting sauce, this recipe delivers plenty of cozy appeal without complicated preparation.

Save this Crock Pot Pepper Steak recipe for your next busy dinner night, share it with someone who loves easy slow cooker meals, and come back whenever you’re ready for another comforting homemade recipe.

Sometimes the best dinners are the ones that let the slow cooker do most of the work while you get on with your day.

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