Part One Ingredients :
1 1/4 cup butter
2 eggs
2 cups sugar
2 tsp vanilla

Part Two Ingredients :
2 cups flour
1 tsp baking soda
1 cup chocolate chips
1 cup M&M's
1/4 cup cocoa
1/2 tsp salt

Part One Preparation :
Cream ingredients well.

Final Preparation :
Add part 1 mixture to part 2 mixture. Spread 1/2 mixture in pan. Top with M&M's and then remaining dough. Bake at 375F for 25-30 minutes.