Preparation Steps

• Preheat oven to 350°F (175°C). Line an 8x8 inch baking pan with parchment paper, leaving an overhang on the sides.
• In a medium bowl, combine graham cracker crumbs and sugar. Pour in the melted butter and stir until combined. Press the mixture evenly into the bottom of the prepared baking pan.
• Bake the crust for 8-10 minutes, until lightly golden. Remove from oven and let cool slightly.
• While the crust cools, make the fudge layer. In a saucepan over low heat, combine sweetened condensed milk, chocolate chips, and butter. Stir continuously until the chocolate and butter are melted and the mixture is smooth.
• Pour the fudge mixture over the cooled graham cracker crust and spread evenly.
• Sprinkle the mini marshmallows evenly over the fudge layer. Sprinkle the additional graham cracker crumbs and chocolate chips over the marshmallows.
• Return the pan to the oven and bake for another 5-7 minutes, or until the marshmallows are puffed and lightly golden.
• Let the bars cool completely in the pan before cutting into squares. For cleaner cuts, chill in the refrigerator for at least 1 hour before slicing.