Lemon Squares
["1 c. butter, melted", "2 c. plus 4 lb. flour", "1 scant c. 10x sugar", "6 Tbsp. lemon juice", "4 eggs", "2 c. sugar", "1 Tbsp. baking powder"]
["Combine butter, 2 cups flour and 10x sugar. Put into a buttered 9 x 13-inch pan.", "Bake 20 minutes at 350\u00b0."]
["butter", "flour", "sugar", "lemon juice", "eggs", "sugar", "baking powder"]