Easy Lemon Squares
["2 c. flour", "1/3 c. sugar", "1 c. butter (2 sticks)", "4 eggs", "2 c. sugar", "1/4 c. flour", "1/4 c. lemon juice *", "1 tsp. baking powder"]
["*If you like more lemon flavor, add some lemon extract to lemon juice."]
["flour", "sugar", "butter", "eggs", "sugar", "flour", "lemon juice", "baking powder"]