Preheat oven to 350º F. Line an 8x8 inch baking pan with parchment paper.
Mix together graham cracker crumbs, sugar, and melted butter. Press into the bottom of the baking pan. Bake for 8 minutes.
3/4 cup graham crackers, 2 Tablespoons sugar, 3 Tablespoons butter
Meanwhile, prepare the brownie batter. Mix together melted butter and cocoa powder. Add sugar and eggs, and mix until well combined. Mix in flour and salt until everything is well blended. Pour over baked graham cracker crust.
3/4 cup butter, 3/4 cup cocoa powder, 1 1/2 cups sugar, 3 whole large eggs, 3/4 cup all-purpose flour, 1/2 teaspoon salt
Return to the oven and bake fro 30-35 minutes, until brownies are almost fully cooked. Remove from oven and turn on the broiler.
Top the brownies with marshmallows and broken pieces of candy. Return to the oven, and heat until marshmallows are golden brown (2-3 minutes). Watch carefully.
2 cups mini marshmallows, 2 Hershey candy bars
Remove from oven, and allow to cool completely before slicing.