3/4 c. butter
1 1/2 c. sugar
3 c. flour
4 eggs
1 1/2 tsp. baking powder
1 1/2 tsp. baking soda
1 pt. sour cream
1 1/2 tsp. vanilla

NUT MIXTURE:

1 c. ground walnuts
1 1/2 c. dark brown sugar
2 tbsp. flour
1 tsp. cinnamon

Cream butter and sugar together and add eggs one at a time. Sift dry ingredients together 3 times and add slowly to the creamed mixture. Add the liquid ingredients. Swirl in the nut mixture. Pour into a large angel food pan and bake for 1 hour and 15 minutes at 350 degrees. Cool in pan on cake rack for 15 minutes. Do not frost.