Ingredients

1 3/4 cups sifted all-purpose flour 

1/3 cup sifted confectioners' sugar 

1/4 teaspoon salt 

3/4 cup (1 1/2 sticks) chilled unsalted butter, cut into pieces, plus more for baking dish 

1 teaspoon plus 1 tablespoon finely grated lemon zest 

1/3 cup almonds, toasted and chopped 

2 cups granulated sugar 

4 large eggs, beaten 

1/2 cup freshly squeezed lemon juice 

1/2 teaspoon baking powder 

Preparation

Preheat oven to 350 degrees. Into a medium bowl, sift together 1 1/2 cups flour, the confectioners’ sugar, and the salt. Cut in the butter, 1 teaspoon zest, and almonds until mixture just clings together.

Press mixture into a lightly buttered 9-by-13-inch baking dish. Bake until just firm and lightly golden, about 20 minutes. Let cool slightly before filling.

In a large nonreactive bowl, stir together the granulated sugar, eggs, lemon juice, baking powder, and remaining 1/4 cup flour and tablespoon zest until combined. Pour into prepared crust.

Bake until filling is set and lightly browned, 25 to 30 minutes. Transfer to a wire rack to cool. Cut into squares.