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

CRUMB TOPPING:

1 c. powdered sugar
1/2 c. flour
5 tbsp. butter
2 tsp. cinnamon

Put ingredients for topping in small bowl, rub together to make crumbs and set aside.

Cream butter and sugar well. Beat in eggs, 1 at a time. Sift baking powder into flour and mix baking soda into sour cream. Stir in half the flour until batter is smooth. Then add the cream and stir in remaining flour, salt and vanilla.