1/2 c. butter
3/4 c. sugar
1/2 c. packed brown sugar
1 egg
1/2 c. sour cream
1 3/4 c. flour
1 tsp. vanilla
1/2 c. baking cocoa
1 tsp. baking powder
1/2 tsp. baking soda
1/2 tsp. salt
1 c. chocolate chips
1/2 c. white chocolate chips

Cream butter and sugar; beat in egg, sour cream and vanilla. Stir in dry ingredients and add chips.

Bake at 350°F.

Yields 3 dozen.