01 - Line an 8-inch square baking pan with parchment paper, ensuring an overhang on the sides for effortless removal.
02 - In a mixing bowl, blend graham cracker crumbs, melted butter, and sugar until the mixture is uniformly moistened. Press firmly into the pan to create an even base.
03 - Combine chocolate chips and heavy cream in a microwave-safe bowl. Heat in 30-second intervals, stirring after each, until the mixture is smooth and glossy.
04 - Pour the melted chocolate mixture over the graham cracker base, smoothing evenly with a spatula.
05 - Sprinkle mini marshmallows evenly atop the chocolate, pressing them gently into the layer.
06 - Refrigerate for at least 1 hour or until the bars are fully set.
07 - For added flavor and appearance, lightly toast the marshmallows using a kitchen torch before serving.
08 - Lift the chilled bars from the pan using the parchment paper overhang, slice into squares, and serve.