Step 1

For the crust: Preheat the oven to 350 degrees F. Grease a 9-by-13-inch pan with butter. If you want a thicker crust, use a 9x9 pan instead.

Step 2

Stir together the flour, sugar, and salt. Add the butter to the bowl and use a pastry cutter to cut it all together until the mixture resembles fine crumbs.

Step 3

Press into the prepared pan and bake until golden around the edges, about 20 minutes.

Step 4

For the filling: Stir together the sugar and flour. Crack in the eggs and whisk to combine.

Step 5

Add the lemon zest and juice and mix until combined. Pour over the crust and bake about 20 minutes.

Step 6

Allow to cool in the fridge for a minimum of 2 hours, then sift powdered sugar over the top before cutting into squares.

Step 7

Store leftover lemon bars in the fridge.