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

Cream butter and sugar. Add eggs and beat until fluffy. Sift dry ingredients. Mix sour cream into butter mixture. Add flour and then vanilla. Mix topping ingredients. Pour 1/2 batter in 9 inch square greased pan. Sprinkle 1/2 topping over batter. Repeat.

Bake at 350°F for 40 minutes.

Topping:

1 tbsp. cinnamon
1/4 c. brown sugar
1 1/2 tbsp. butter
2 tbsp. chopped nuts