Coffee Cake

batter:

1 cup sour cream

1 tsp baking soda

mix together then add

1/2 cup margarine

1 cup sugar

2 eggs

1 tsp vanilla

1 3/4 cups flour

2 tsp baking powder

topping:

1/4 cup brown sugar

1 Tblsp cinnamon

2 Tblsp chopped walnuts

pour batter in greased 8 x 8 baking pan and top with topping mix

bake in 350 degree oven for 40 - 45 minutes