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

FILLING:

2 tsp. cinnamon
3/4 c. brown sugar
1/2 c. chopped nuts

Cream butter and sugar. Add eggs. Sift together flour, baking powder, soda and salt. Add to butter alternately with sour cream. Add vanilla. Pour 1/2 of the batter into a greased 9 x 13 inch pan. Sprinkle 1/2 of the filling over, then rest of the batter, then rest of the filling. Bake at 350 degrees for 45-50 minutes.