Description
This classic Lemon Bars recipe features a buttery, flaky shortbread crust topped with a tangy, smooth lemon custard. Perfectly balanced between sweet and tart, these bars are a refreshing treat that can be enjoyed year-round. With a crisp crust and luscious filling, this dessert is easy to prepare and ideal for parties, potlucks, or simply as a delightful homemade dessert.
Ingredients
Scale
For the Crust
- 1 and 3/4 cups all-purpose flour (spooned and leveled)
- 1/4 cup cornstarch
- 2/3 cup powdered sugar
- 1/2 teaspoon kosher salt (use half the amount of table salt)
- 1 teaspoon lemon zest (the zest of one lemon)
- 1 cup cold butter (2 sticks)
For the Lemon Custard
- 6 large eggs
- 2 and 1/4 cups granulated sugar
- 1/2 cup + 1 tablespoon all-purpose flour (spooned and leveled)
- 1/2 teaspoon kosher salt (use half the amount of table salt)
- 2 tablespoons lemon zest (about 6-8 lemons)
- 1 cup + 2 tablespoons fresh lemon juice (about 6-8 medium lemons)
For Serving
- Powdered sugar (for dusting)
Instructions
- Prepare the Pan: Line a 9×13 inch glass or ceramic baking pan with parchment paper, or alternatively, spray the sides with nonstick spray or rub with butter to prevent sticking.
- Mix Dry Crust Ingredients: In a large bowl, whisk together 1 and 3/4 cups flour, 1/4 cup cornstarch, 2/3 cup powdered sugar, 1/2 teaspoon kosher salt, and the zest of one lemon to combine all dry ingredients evenly.
- Cut in Butter: Use a pastry cutter or butter knife to cut 1 cup cold butter into the flour mixture until the pieces are about pea-sized, creating a coarse, crumbly texture essential for a flaky crust.
- Form the Crust: Press the butter-flour mixture firmly and evenly into the lined pan using a measuring cup to compact it tightly; the mixture will appear dry but should hold together well.
- Chill the Crust: Freeze the pan for about 20 minutes or chill in the fridge for 30 minutes to ensure the butter stays cold for a tender crust.
- Preheat Oven: Set your oven to 350°F (175°C) while the crust chills to prepare for baking.
- Bake the Crust: Bake the crust for 24-25 minutes until the edges are golden brown and the top has lost its shine, indicating it’s properly baked without overcooking.
- Cool the Crust: Allow the crust to cool nearly completely at room temperature, or speed up cooling by placing it in the fridge or freezer.
- Prepare Lemon Custard: In a large bowl or stand mixer, combine 6 eggs, 2 and 1/4 cups granulated sugar, 1/2 cup + 1 tablespoon flour, 1/2 teaspoon kosher salt, 2 tablespoons lemon zest, and 1 cup + 2 tablespoons fresh lemon juice until thoroughly mixed and smooth.
- Mix Thoroughly: Beat the custard mixture for about 2 minutes, scraping down the sides and bottom of the bowl to ensure all ingredients are well incorporated and no unmixed egg whites remain.
- Pour Custard Over Crust: Evenly pour the lemon custard over the cooled shortbread crust, spreading gently if needed.
- Bake Lemon Bars: Return the pan to the oven and bake for an additional 30-35 minutes, until the edges are set and the center is slightly wiggly but not liquid or sloshy.
- Cool on Rack: Let the lemon bars cool on a wire rack for 20-30 minutes to begin setting the custard.
- Chill: Cover the bars loosely with plastic wrap, avoiding contact with the surface, and refrigerate for at least 2-3 hours or until completely cold and firm.
- Rest Before Serving: Remove from fridge and let rest about 30 minutes for best flavor and texture if time permits.
- Slice Bars: Use a sharp chef’s knife to cut the bars into small squares, wiping the knife clean between cuts for neat slices. Trim edges if desired.
- Dust with Powdered Sugar: Just before serving, dust the top of the lemon bars with powdered sugar using a sieve to add a light, decorative sweetness.
- Store Leftovers: Keep any leftover lemon bars covered in the refrigerator; they will stay fresh for several days.
- Freeze Option: Lemon bars can be frozen and should be thawed overnight in the fridge before serving for best results.
Notes
- For the best crust texture, use cold butter and avoid packing the flour when measuring.
- Adjust lemon zest quantity if you prefer more or less tartness in the lemon custard.
- Ensure the custard edges are well baked even if slightly darker to help the center set properly.
- Use a sharp knife and wipe between slices for cleanly cut lemon bars.
- Do not dust lemon bars with powdered sugar too far in advance, to maintain the decorative effect and avoid the sugar melting into the custard.
- Bars can be chilled or frozen to speed up setting and for longer storage.
