1 pkg. Betty Crocker yellow cake mix
1/4 c. water
2 eggs
1/4 c. soft butter
1/4 c. brown sugar (packed)
1 pkg. (12 oz.) semi-sweet chocolate pieces
1/2 c. chopped walnuts

Heat oven to 375 degrees.

Combine half the cake mix (dry mix), water, eggs, butter and brown sugar in mixing bowl. Mix thoroughly. Blend in remaining cake mix. Stir in chocolate pieces and nuts.

Spread in greased and floured jelly roll pan, 15 1/2 x 10 1/2 inch. Bake 20 to 25 minutes. Cool, cut into bars (makes about 30). Sprinkle with powdered sugar.