3 cups sugar
2 sticks butter (1 cup)
1 stick margarine (1/2 cup)
6 eggs
2 teaspoons vanilla
2 cups sifted all-purpose flour
1 cup sifted self-rising flour
1 (16-ounce) carton sour cream

In a large mixing bowl, beat together sugar, butter and margarine. Add eggs 1 at a time; add vanilla. Alternately add flour and sour cream, mixing well after each addition. Coat a tube pan with floured non-stick spray and pour batter into prepared pan. Bake 2 hours at 300 F.