Prepare the Graham Cracker Base

1. Crush the Graham Crackers: Start by crushing the graham crackers into fine crumbs. You can do this by placing them in a plastic bag and smashing them with a rolling pin, or using a food processor if you have one.
2. Mix with Butter: In a mixing bowl, combine the graham cracker crumbs, melted butter, and sugar. Stir until everything is well-coated and the mixture resembles wet sand.
3. Press into a Pan: Lightly grease a 9×9-inch square baking pan (or a similar-sized dish). Press the graham cracker mixture evenly into the bottom of the pan, creating a firm base for your dessert. Use the back of a spoon to press it down tightly.
4. Freeze the Base: Place the pan in the freezer for about 15-20 minutes to set while you prepare the marshmallow layer.

Make the Marshmallow Layer

1. Heat the Cream: In a small saucepan, heat 1 cup of heavy cream over medium heat until it begins to simmer. Don’t let it come to a full boil—just enough to get the cream warm.
2. Melt the Marshmallows: Add the mini marshmallows to the warm cream and stir until they completely melt and form a smooth, fluffy mixture. This will take just a few minutes.
3. Add Vanilla: Once the marshmallows are melted, stir in the vanilla extract for added flavor.
4. Cool and Pour: Let the marshmallow mixture cool slightly before pouring it over the graham cracker crust. Spread it out evenly with a spatula.
5. Freeze Again: Return the pan to the freezer for about 30-45 minutes until the marshmallow layer is firm to the touch.

Make the Chocolate Layer

1. Heat the Chocolate and Cream: In another saucepan, heat 1/2 cup of heavy cream over medium heat. Once it begins to simmer, remove it from the heat and stir in the semi-sweet chocolate chips. Stir continuously until the chocolate is completely melted and smooth.
2. Add Vanilla: Stir in the vanilla extract for an extra touch of flavor.
3. Let It Cool: Allow the chocolate mixture to cool for a few minutes so it doesn’t melt the marshmallow layer when you pour it on top.

Assemble the Frozen S’mores

1. Top with Chocolate: Once the marshmallow layer is firm, pour the chocolate mixture over the top, spreading it evenly to cover the marshmallows.
2. Freeze: Place the entire pan back into the freezer for another 1-1.5 hours, or until the chocolate layer is completely set and firm.
3. Serve and Enjoy: Once everything is frozen and firm, slice it into squares and serve. You can let it sit out for a few minutes before serving to make cutting easier.