1 1/3 cup melted butter
2 cups granulated sugar
2/3 cup powdered sugar
4 eggs
1 1/3 cup flour
3/4 cup cocoa
1 cup semisweet chocolate chips
1/2 cup crushed walnuts (optional)
Melt butter over a low heat, don't let it bubble. Mix sugars and cocoa in a largemixing bowl. Add melted butter and stir until completely mixed. Add Eggs and mix. Then add flour and chocolate chips and (nuts). Pour batter into a 9x12 greased pan. Bake at 350 for 25-30 minutes. Cool for 1 hour before cutting.
You can replace the chocolate chips with peanutbutter chips.