Lemon Squares
["2 c. sifted flour", "1/2 c. powdered sugar", "1/2 c. butter or margarine"]
["Preheat oven to 325\u00b0.", "Mix crust ingredients together with a fork and blend.", "Press into the bottom of a 9 x 13-inch greased pan and bake for 20 minutes."]
["flour", "powdered sugar", "butter"]