Delicious Lemon Crumb Bars – Buttery, Creamy & Easy

These lemon crumb bars combine a buttery, crumbly crust with a smooth and creamy lemon filling for a bright dessert that is both simple and satisfying. The crust is made with flour, brown sugar, granulated sugar, and melted butter, while the lemon layer uses sweetened condensed milk, egg yolks, heavy cream, and fresh lemon juice. A portion of the crust mixture becomes the golden crumb topping, giving every square a delicious contrast of textures. After baking, the bars are cooled and chilled until fully set, making them easy to slice and serve.

Quick Recipe Snapshot

• Prep Time: Not provided
• Bake Time: 30–35 minutes total
• Chill Time: At least 4 hours
• Oven Temperature: 350°F (175°C)
• Pan: 9×9-inch baking pan
• Yield: Not provided

Why You’ll Love These Lemon Crumb Bars

• Bright lemon flavor: Fresh lemon juice gives the filling its signature citrus flavor.
• Buttery crumb topping: The same mixture used for the crust creates a golden topping.
• Creamy filling: Sweetened condensed milk and egg yolks create a smooth lemon layer.
• Simple preparation: The crust and filling come together with straightforward steps.
• Great make-ahead dessert: The bars need at least 4 hours in the refrigerator to fully set.

Ingredients

For the Crust

• 2 ⅓ cups all-purpose flour
• ½ cup granulated sugar
• ½ cup packed light brown sugar
• ¾ teaspoon salt
• ¼ teaspoon baking powder
• 12 tablespoons unsalted butter, melted and cooled

For the Lemon Filling

• 1 (14 oz) can sweetened condensed milk
• 4 large egg yolks, room temperature
• 2 tablespoons heavy cream
• ⅛ teaspoon salt
• ⅔ cup fresh lemon juice, about 4–5 lemons

How to Make Lemon Crumb Bars

1. Prepare the Oven and Pan

Preheat the oven to 350°F (175°C). Line a 9×9-inch baking pan with parchment paper, leaving enough overhang to make the finished bars easier to remove.

2. Make the Crust Mixture

In a large bowl, combine the all-purpose flour, granulated sugar, packed light brown sugar, salt, and baking powder.

Stir in the melted and cooled butter until the mixture forms a crumbly texture.

Press about two-thirds of the crumb mixture firmly into the bottom of the prepared pan to create the crust. Set the remaining crumb mixture aside for the topping.

3. Bake the Crust

Bake the crust for 15 minutes, until it is just starting to set.

4. Prepare the Lemon Filling

While the crust is baking, whisk together the sweetened condensed milk, room-temperature egg yolks, heavy cream, and salt in a separate large bowl.

Gradually add the fresh lemon juice while whisking until the mixture is smooth and creamy.

5. Assemble the Bars

Remove the crust from the oven. Pour the lemon filling over the hot crust.

Sprinkle the reserved crumb mixture evenly over the lemon filling.

6. Bake Again

Return the pan to the oven and bake for an additional 15–20 minutes, or until the topping is golden and the lemon filling is set.

7. Cool and Chill

Let the bars cool completely at room temperature.

Place them in the refrigerator for at least 4 hours so the filling can fully set before cutting into squares.

Important Tips

• Line the pan with parchment: Leave enough overhang to make removing the chilled bars easier.
• Cool the melted butter: The recipe calls for melted butter that has been cooled before mixing it into the crust ingredients.
• Reserve one-third of the crumb mixture: About two-thirds forms the crust, while the remaining mixture is used as the topping.
• Use room-temperature egg yolks: This is specifically called for in the lemon filling.
• Add the lemon juice gradually: Whisk as you add the fresh lemon juice until the filling becomes smooth and creamy.
• Chill before cutting: The bars need at least 4 hours in the refrigerator to fully set.

Storage and Make-Ahead

These lemon crumb bars need to be chilled for at least 4 hours before cutting, so they are well suited to preparing ahead of serving. Keep the finished bars refrigerated after they have cooled and set.

Frequently Asked Questions

How long do lemon crumb bars need to chill?

The bars need to chill in the refrigerator for at least 4 hours so the lemon filling can fully set before cutting.

What size pan should I use?

The recipe calls for a 9×9-inch baking pan lined with parchment paper.

How much lemon juice do I need?

You need ⅔ cup of fresh lemon juice, which is approximately the juice from 4–5 lemons.

Do I bake the crust before adding the lemon filling?

Yes. The crust is baked for 15 minutes, until it is just starting to set. The lemon filling is then poured over the hot crust.

How do I know when the bars are finished baking?

After the second bake of 15–20 minutes, the crumb topping should be golden and the lemon filling should be set.

Final Thoughts

These lemon crumb bars bring together a buttery crumb crust, creamy fresh-lemon filling, and golden crumb topping in one simple dessert. The combination of sweetened condensed milk and fresh lemon juice creates a smooth, bright center, while the crumb layers add plenty of texture. Give the bars enough time to cool and chill before slicing for neatly set lemon squares.

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