Preheat oven to 350 degrees.

In a large bowl, mix the graham cracker crumbs, butter and eggs until well combined. Line an 8x8 inch baking dish with parchment and press the graham cracker mixture into the bottom of the dish in an even layer.

Bake the cracker crust for 15 minute until the edges begin to look dry.

Pour the chocolate chips over the crust and spread out in an even layer. Return the baking dish to the oven for 1-2 minutes or until the chips begin to soften.

Spread the chips into a smooth, even layer with an offset spatula (carefully, the dish is very hot!)

Sprinkle the marshmallows over the chocolate and return the baking dish to the oven.

Bake until the marshmallows are puffed up and golden brown, approximately 6-8 minutes.

Transfer the dish to a wire baking rack and allow to cool to room temperature.

Remove the bars from the dish by lifting the edges of the parchment out of the dish.

Cut into 12 squares.

Serve immediately or store in an airtight container for up to 3 days.