Start by preheating your oven to 350°F.
Then lightly spray a 9×13-inch baking pan with cooking spray.
Using a mixer with a paddle attachment, cream the butter and sugar together on medium speed for about 2 minutes until it looks light in color. Then, add the lemon zest and mix for a few seconds.
In a separate bowl, combine the flour and salt. With the mixer on low, slowly add the flour mixture to the butter mixture until just mixed, about 1 minute.
Take the dough, place it onto a well-floured board, gather into a ball, and transfer it to the baking pan. Use your fingers to evenly press and flatten the dough into the pan.
Chill the dough in the fridge for 15 minutes.
Bake the crust for 15 to 20 minutes, or until it’s very lightly browned.
Let the crust cool on a wire rack for about 30 minutes. Keep your oven heated to 350°F.