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

Cream butter and sugar until fluffy. Add eggs one at a time; beat until smooth. Sift flour with baking powder, soda and salt. Add to creamed mixture with sour cream; add vanilla. Pour half of batter into well-greased and floured pan.

FILLING AND TOPPING:

1/2 c. brown sugar
1/4 c. white sugar
1 tsp. cinnamon
1 c. chopped nuts

Mix sugars, cinnamon and nuts. Sprinkle half of topping over batter. Cover with remaining batter; sprinkle with remaining topping. Bake at 350 degrees for 60 minutes in a 13x9-inch pan.