1 c. butter, softened
3 c. sugar
6 eggs
1 tbsp. vanilla
2 1/4 c. flour
1/2 c. baking cocoa
1 tsp. baking powder
1/2 tsp. salt
1 c. (6 oz.) semi-sweet chocolate chips
1 c. (6 oz.) white chips
1 c. nuts, chopped

In a mixing bowl, cream butter and sugar. Add eggs and vanilla; mix well. Combine flour, cocoa, baking powder and salt. Stir into creamed mixture just until blended. (Do not overmix.) Pour into a greased 15 x 10 x 1-inch baking pan. Sprinkle with nuts and chips.

Bake at 350°F for 30 to 35 minutes.

Yields 3 to 4 dozen.