Preheat oven to 350 degrees. Grease your mini muffin pan with nonstick baking spray well or flour and butter it, whatever is easiest.
Prepare your mix according to the instructions. Note we substituted milk for the water. That is optional and just our preference for a more flavorful and moist brownie.
Use your one oz scooper to scoop brownie batter into your mini muffin pan. If you don't have a one oz scoop use two tablespoons per mini muffin.
Bake for 8 minutes. Take pan out of the oven. Add two mini marshmallows, crushed graham crackers and one half of a Hershey's rectangle on top, press down lightly.
Place pan back into the oven and bake for another 10 minutes or so until the marshmallows on top are light to golden brown.
Allow to cool completely before consuming or it will be too fudgy and messy!
