There is something undeniably comforting about a dessert that combines the tangy brightness of citrus with the buttery crunch of a cookie crust. These Lemon Crumb Bars are the perfect example. With a golden, biscuit-like base, a thick, silky-smooth lemon custard center, and a cloud of fluffy whipped cream on top, they are the quintessential crowd-pleaser.
The best part? They are deceptively simple to make. Using a shortbread-style crust means no rolling out dough, and the lemon filling sets up beautifully in the oven. Whether you are serving them at a summer barbecue, a baby shower, or just because you crave something sweet and tart, these bars are guaranteed to steal the show.
(Note: The image shows a 9×13-inch glass baking dish. The recipe below is tailored perfectly for that size.)
The Recipe
Prep time: 20 minutes | Cook time: 35-40 minutes | Chill time: 2+ hours | Servings: 12-16 bars
Ingredients
For the Shortbread Crust:
· 2 cups (250g) all-purpose flour
· 1/2 cup (100g) granulated sugar
· 1/4 teaspoon salt
· 1 cup (226g) unsalted butter, cold and cubed
For the Lemon Filling:
· 4 large eggs
· 1 1/2 cups (300g) granulated sugar
· 1/4 cup (30g) all-purpose flour
· 1/2 cup (120ml) fresh lemon juice (about 3–4 large lemons) Note: Do not use bottled juice.
· 2 tablespoons finely grated lemon zest (plus extra for garnish)
· Optional: 1 drop of yellow food coloring for a brighter hue (though natural color is lovely).
For the Whipped Cream Topping:
· 1 1/2 cups (360ml) heavy whipping cream, cold
· 1/3 cup (40g) powdered sugar
· 1 teaspoon vanilla extract
Step-by-Step Instructions
- Preheat and Prep:
Preheat your oven to 350°F (175°C). Grease a 9×13-inch glass baking dish (like the one in the photo) with butter or non-stick spray. - Make the Crust:
In a medium bowl, whisk together the flour, sugar, and salt. Using a pastry blender or your fingers, cut in the cold butter until the mixture resembles coarse sand with a few pea-sized butter lumps remaining. (Alternatively, pulse in a food processor). Press the mixture firmly and evenly into the bottom of your prepared baking dish. - Par-bake the Crust:
Bake the crust for 15 minutes, until it is just slightly golden around the edges. While it bakes, prepare the filling. - Make the Lemon Filling:
In a large bowl, whisk the eggs and sugar together until light and fluffy. Whisk in the flour until completely incorporated and no lumps remain. Finally, whisk in the fresh lemon juice and lemon zest. - Bake the Bars:
Carefully pour the lemon filling over the hot crust (the hot crust helps the filling set quickly). Return the dish to the oven and bake for 20–25 minutes, or until the filling is set in the center and does not jiggle when you gently shake the pan. - Cool Completely:
Place the baking dish on a wire rack and let it cool completely to room temperature. Once cool, transfer it to the refrigerator and chill for at least 2 hours (up to overnight). This step is crucial for clean cuts! - Make the Whipped Topping:
In a chilled bowl, beat the heavy cream, powdered sugar, and vanilla extract with a hand mixer until stiff peaks form. - Assemble and Serve:
Spread the whipped cream evenly over the chilled lemon layer. Use a large sharp knife (cleaned between cuts) to slice the bars into 12 or 16 rectangles. Before serving, sprinkle the top with the reserved fresh lemon zest for that beautiful finish seen in the photo. - Storage:
Store any leftovers in the refrigerator, tightly covered, for up to 3 days. The crust will soften slightly over time, but the flavor will be even better on day two!
Chef’s Tips for the Perfect Bar:
· Zest before you juice: It is much easier to zest a whole lemon than a squishy one!
· Glass vs. Metal: Glass dishes like the one in the photo conduct heat differently than metal. For bars, glass is excellent because it prevents the crust from browning too quickly, keeping the filling smooth.
· Clean cuts: To get those clean, straight lines, dip your knife in warm water and wipe it dry between each slice.