1 c. butter
1 c. sugar
2 eggs
1 tsp. vanilla
2 c. flour
1 tsp. baking soda
1 tsp. baking powder
1 c. sour cream or yogurt

Cream butter and sugar. Add eggs and vanilla mix well. Add dry ingredients alternately with sour cream.

Topping:

1/2 c. brown sugar
1/3 c. chopped nuts
4 tbsp. white sugar
1 tsp. cinnamon
2 apples, peeled and sliced

Mix first 4 topping ingredients together.

Grease and flour an angel food cake pan with removable bottom. Put half of the batter in pan. Lay apple slices on batter and sprinkle half of the topping over them. Add remaining batter and sprinkle the rest of the topping on it.

Bake in a 350°F oven for 35 to 40 minutes.