Romanian Coffee Cake

1 1/2 cups sour cream
1 1/2 tsp baking soda

1 cup butter or margarine
1 1/2 cups sugar
3 eggs
1 tsp vanilla
3 cups flour
2 tsp baking powder
1 1/2 tsp salt

Topping:
1 cup sugar
4 tsp cinnamon
1 cup chopped nuts

Combine sour cream and baking soda. Let stand for exactly 2 hours.

Cream butter and sugar until fluffy. Add eggs and vanilla. Fold in sour cream. Add dry ingredients. Mix well together. Alternate batter and topping (3 each) in a greased angel food pan. Bake at 350 degrees F. for 1 hour. Sprinkle powdered sugar over cooled cake. Serves 12.