Preheat your oven to 350°F (175°C). Crush 7 whole graham crackers finely until you have about 1 cup.

In a mixing bowl, combine the crushed graham crackers with 2 tablespoons of powdered sugar and 4 tablespoons of melted unsalted butter. Stir until resembling wet sand.

Grease a mini muffin pan with cooking spray or butter. Divide the graham mixture evenly among the muffin cups, pressing down to create shallow crusts.

Bake for 4-5 minutes, until edges are golden brown.

Carefully remove from oven and place a piece of milk chocolate into each crust while warm. Allow chocolate to soften.

Slice large marshmallows in half horizontally and place cut side down over the melted chocolate in each cup.

Return to the oven and bake for another 3-5 minutes, watching closely until marshmallows puff and turn golden.

Remove from oven and cool in the pan for about 10 minutes before serving.