In a large bow mix the butter and chocolate chips; melt in the microwave; stir in the vanilla and eggs
Add sugar, flour, baking soda and cinnamon; stir until well combined
Chop 1 ½ of the Hershey bars; add to the brownie mixture; combine
Pour into a greased 9×13 inch baking pan; bake for 20 minutes until toothpick comes out clean
Allow to cool slightly before spreading the marshmallows on top; coarsely chop the remaining Hershey bars; add to the top with marshmallows; crumble the graham crackers on top
Broil for a few minutes until marshmallows are browned; allow to cool before serving