Coconut Cream Cake
["1/2 c. margarine", "1/2 c. shortening", "2 c. sugar", "5 eggs, separated", "2 c. sifted flour", "1 tsp. soda", "1 c. buttermilk", "7 oz. can flaked coconut (1 2/3 c. for cake and 1 c. for filling)"]
["Blend shortening and margarine together in large mixing bowl on medium-high speed.", "Add sugar gradually and beat until fluffy. Add egg yolks, one at a time, beating well after each addition. Sift flour and soda together.", "Add alternately with buttermilk, beginning and ending with flour mixture.", "Add 1 2/3 cups coconut to cake batter.", "Beat egg whites until stiff peaks form; fold into batter."]
["margarine", "shortening", "sugar", "eggs", "flour", "soda", "buttermilk", "flaked coconut"]