Sour Cream Coffeecake

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

TOPPING:
1/3 cup brown sugar
1/2 cup sugar
1/2 cup chopped pecans
1 tsp vanilla

Mix topping ingredients together and set aside.

Beat together, butter, sugar, vanilla, and eggs. Add sour cream, flour, soda, baking powder, and salt.

Put half the mixture in a prepared (greased and floured) 9x13" pan. Sprinkle with half the topping mixture. Repeat layers. Bake at 350º for 35-40 min.