Recipe from Belinda Scrivner of Arkansas
Spray the bottom and sides of a 9 x 13-inch pan with cooking spray.
Line the bottom with graham cracker squares.
Prepare a family-size brownie mix mix as directed on box. Pour mix on top of crackers.
Spread marshmallow cream top of mix. Use a knife to swirl into batter.
Bake as directed on box.
When done, remove from oven. While still hot, top with Hershey bars. Then, top with more graham crackers, smashed down until the chocolate oozes out around the crackers.
While warm, cut along the lines on the crackers