1 c. butter
2 c. sugar
2 eggs
1 c. sour cream
1/2 tsp. vanilla
2 c. flour
1 tsp. baking powder
1/4 tsp. salt

TOPPING:

1/2 c. brown sugar
2 tbsp. butter
2 tbsp. flour
2 tsp. cinnamon

Cream butter and sugar; add eggs. Fold in sour cream and vanilla. Add dry ingredients. Combine topping ingredients. Spoon 1/2 batter into greased and floured 10" tube pan. Cover with 1/2 topping, repeat. Bake 1 hour. Cool completely before removing from pan.