- Dough Preparation: In a stand mixer bowl, combine lukewarm milk, lukewarm water, instant yeast, granulated sugar, and all-purpose flour. Add melted unsalted butter and salt. Mix all ingredients together until well combined to form the dough.
- Kneading: Attach the dough hook to your mixer and knead the dough for 6-8 minutes until it becomes smooth and elastic. Cover the dough and let it rest for 15 minutes to allow it to rise slightly.
- Filling Preparation: In a saucepan over low to medium heat, whisk together unsweetened cocoa powder, heavy whipping cream, semi-sweet chocolate chips, and granulated sugar. Add melted unsalted butter, vanilla extract, and a pinch of salt. Stir continuously until the mixture is smooth and fully combined. Remove from heat and allow to cool before folding in the graham cracker crumbs.
- Assembly: On a lightly floured surface, roll out the dough into a 10” x 16” rectangle. Brush the surface with melted butter, then evenly spread the cooled chocolate and graham cracker filling over the dough, leaving the edges clear. Sprinkle additional graham cracker crumbs on top. Roll the dough tightly into a log, slice into 8-10 even pieces, and arrange them in a greased baking pan.
Baking: Preheat your oven to 350°F (175°C). Bake the rolls for 25-28 minutes or until they turn golden brown. After baking, cool the rolls in the pan for 10 minutes before adding the meringue topping.
- Meringue Preparation: Using a double boiler, combine the egg whites and granulated sugar. Whisk constantly until the mixture becomes warm and the sugar dissolves completely. Transfer the mixture to a stand mixer and beat until stiff peaks form, then add the cream of tartar, salt, and remaining vanilla extract while continuing to beat.
- Finalizing Rolls: Spread the prepared meringue over the warmed s’mores rolls. Using a kitchen torch or broiler, carefully toast the meringue until it turns a beautiful golden brown, adding a perfect finish to your gooey s’mores rolls.