S'mores Brownies

Found this tasty little treat out in blog-land and I knew that I had to try it! I made it for the 4th of July and it was a hit... The pieces end up being ginormous, but so yummy!

S'mores Brownies
(recipe found at anniebakes.net)

1 (21 oz) package Chewy Fudge Brownie Mix
2 cups mini marshmallows
1 cup chocolate chips
graham crackers, broken into halves

Preheat oven to 350. Grease the bottom of a 9x13 pan. Prepare and bake brownie mix following the recipe on the package. Immediately upon removal from the oven, sprinkle marshmallows and chocolate chips over warm brownie mix. Return to hot oven for about 2 minutes to melt. Arrange graham crackers on top of hot marshmallows and press lightly. Cool completely and cut into servings around the graham crackers.