S'Mores Brownies

1 pkg brownie mix
2 cups mini-marshmallows
5 graham crackers, broken into quarters
1 cup milk chocolate chips

Preheat oven to 350. Grease bottom of 9x13 pan. Prepare and bake brownie mix as directed. Immediately upon removal from oven, sprinkle marshmallows and chocolate chips over warm brownie surface. Return to hot oven for about 2 minutes to melt. Arrange graham crackers on top and press down lightly. Cool completely. Cut and serve.