1heat oven to 350. Line muffin cups w/ mini cupcake liners. In lg bowl pour hot milk over the espresso powder and 1/3 cup chocolate chips, allowing them to soften. Stir until smooth.
2Add the egg, oil and 1 tsp vanilla and stir until combined. In another bowl whisk together the flour, cocoa powder, graham cracker crumbs, both sugars, baking powder and baking soda. Add the dry ingredients to the wet ingredients. Stir until just combined.
3Fill the cupcake liners 3/4 full. Bake for about 10-12 mins or until centers spring back when lightly pressed. In medium bowl, combine the marshmallow fluff, 1/2 tsp vanilla and 2 tbsp boiling water. Stir until smooth. When cupcakes are cooled, dip them in the marshmallow mix. Sprinkle w/ some mini chocolate chips. Place 1 square of the cereal on top of each muffin.