Heat oven to 350 degrees F. Grease and flour a Bundt pan.
Cream margarine and sugar. Add vanilla extract. Cream. Add eggs, one at a time,
beating well after each egg is added. Stir in flour mixture and sour cream alternately
- a small amount at a time - always begin with flour mixture and end with flour.
Put half of the mixture into prepared Bundt pan. Add 3/4 cup of the topping on top
of the batter. Pour remaining batter gently over the topping and the first layer
of batter. Cover with the remaining 1/4 cup of topping.