Cinnamon-Frosted Zucchini Bars
["1 3/4 c. flour", "1 1/2 tsp. baking powder", "3/4 c. margarine or butter", "1/2 c. sugar", "1/2 c. brown sugar, packed", "2 eggs", "1 tsp. vanilla", "2 c. shredded zucchini", "1 c. coconut", "1/4 c. chopped walnuts", "2 c. sifted powdered sugar", "2 Tbsp. milk", "2 Tbsp. margarine or butter, melted", "1 tsp. cinnamon", "1 tsp. vanilla"]
["In a small bowl, combine flour and baking powder.", "In a large bowl, beat margarine with electric mixer on medium speed 30 seconds.", "Add two sugars.", "Beat until fluffy.", "Add eggs and 1 teaspoon vanilla.", "Beat well.", "Stir in flour mixture.", "Stir in zucchini, coconut and nuts.", "Spread evenly in a greased 15 x 10 x 1-inch baking pan.", "Bake at 350\u00b0 about 30 minutes or until toothpick comes out clean.", "Cool completely in pan on wire rack."]
["flour", "baking powder", "margarine", "sugar", "brown sugar", "eggs", "vanilla", "zucchini", "coconut", "walnuts", "powdered sugar", "milk", "margarine", "cinnamon", "vanilla"]