Lemon Squares
["2 c. flour", "1/2 c. sugar", "1 c. margarine", "4 eggs", "1/3 c. lemon juice", "2 c. sugar", "1 tsp. grated lemon rind (optional)", "1/4 c. flour", "1/2 tsp. baking powder"]
["Mix first 3 ingredients in a food processor.", "Pat into a 9 x 13-inch pan.", "Bake at 350\u00b0 for 20 to 25 minutes until light brown. Mix next 6 ingredients in a food processor.", "Pour over hot crust.", "Continue to bake at 350\u00b0 for 25 minutes; cool.", "Sprinkle with confectioners sugar.", "Cut into squares."]
["flour", "sugar", "margarine", "eggs", "lemon juice", "sugar", "lemon rind", "flour", "baking powder"]