Sour Cream Coffee Cake - Aunt Barb

1 cup butter, softened
1 cup sugar
2 eggs
1 tsp vailla
1 cup sour cream
2 cups flour
1 tsp baking powder
1 tsp baking soda
1/2 tsp salt

Filling:
1/3 cup sugar
1/4 cup brown sugar
1 tsp cinnamon
3/4 cup walnuts, chopped

Cream butter and sugar.  Add eggs, vailla and sour cream.  Mix well.  Add dry ingredients.  Spread 1/2 in a ungreased pan.  Mix together fililng.  Spoon half of filling over batter.  Drop remaining batter by Tbspfull over filling layer.  Spoon remaining filling over top of batter.  Bake 35 minutes at 350 degrees.