A buttery shortbread-style crust is topped with a bright, tangy lemon filling and finished with a generous dusting of confectioners’ sugar. These classic lemon bars balance a rich, tender crust with a fresh citrus filling.
Servings: About 24 bars
Prep Time: About 20 minutes
Cook Time: 45 minutes, plus cooling
Prep Time: About 20 minutes
Cook Time: 45 minutes, plus cooling
Ingredients:
Crust:
- 2 cups sifted all-purpose flour
- ½ cup confectioners’ sugar
- ¼ teaspoon salt
- 1 cup butter, chilled
Lemon Filling:
- 4 eggs
- 2 cups granulated sugar
- ⅓ cup fresh lemon juice
- 1½ teaspoons grated lemon zest
- ¼ cup all-purpose flour
- 1 teaspoon baking powder
For Finishing:
- Confectioners’ sugar, for dusting
Instructions:
- Preheat the oven to 350°F.
- In a medium-large mixing bowl, sift together 2 cups flour, ½ cup confectioners’ sugar and the salt.
- Using a pastry blender or two knives, cut the chilled butter into the flour mixture until it resembles coarse meal and begins to cling together.
- Press the mixture evenly into a 9 x 13 x 2-inch baking pan.
- Bake for 20 minutes, or until lightly browned. Remove from the oven and cool for 10–15 minutes.
- In a large bowl, beat the eggs until blended. Slowly add the granulated sugar while continuing to beat.
- Blend the lemon juice and lemon zest into the egg mixture.
- Sift together the remaining ¼ cup flour and baking powder. Add to the egg mixture and blend until combined.
- Spread the lemon filling evenly over the partially cooled crust.
- Return to the oven and bake for 25 minutes.
- Cool completely in the pan on a wire rack.
- Dust generously with confectioners’ sugar and cut into squares.
Denver High-Altitude Adjustments (5,280 feet):
- Increase oven temperature from 350°F to 365°F.
- Reduce the 2 cups granulated sugar in the filling to 1¾ cups.
- Add 1 tablespoon water to the lemon filling.
- Reduce baking powder from 1 teaspoon to ¾ teaspoon.
- Bake the crust at 365°F and begin checking at 17–18 minutes rather than automatically baking 20 minutes.
- After adding the lemon filling, begin checking at about 20–22 minutes. The filling should be set around the edges with just a slight softness in the center; avoid overbaking.
I wouldn't change the butter, flour, eggs, or lemon juice. Those quantities should work well at Denver altitude.
Tip: Store the lemon bars in an airtight container for about 4 days, or refrigerate for up to about 1½ weeks.
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