Lemon Squares
["1 c. unsalted butter", "1/2 c. confectioners sugar", "2 c. flour", "4 eggs", "juice of 1 lemon", "1 3/4 c. sugar", "1/3 c. flour", "1/2 tsp. baking powder"]
["Cream butter and sugar.", "Add flour; pat mixture into 9 x 13-inch pan and bake at 350\u00b0 for 20 minutes."]
["unsalted butter", "confectioners sugar", "flour", "eggs", "lemon", "sugar", "flour", "baking powder"]