1 package chocolate brownie mix
1 cup peanut butter chips
1- 2 oz package chopped nuts
1 cup mini-marshmallows

Heat oven to 425°F. Prepare brownie mix according to package directions and add in peanut butter chips. Pour into a greased 8x8 baking dish. Sprinkle with chopped nuts and bake 15 minutes. Remove and top with marshmallows and return to oven for 3-5 more minutes. Cool and cut into 12 pieces.