Make the Crust: In a medium bowl, mix graham cracker crumbs, sugar, and melted butter until evenly coated. It should resemble coarse sand. Press with medium pressure into the bottom and sides of an ungreased 9-inch pie pan. It’s helpful to use a flat-bottomed measuring cup to press it into the edges. Set aside.
Prepare the Filling: In a large microwave safe bowl, melt the butter and then stir in coconut oil and sugar until smooth. Let the mixture cool for a few minutes. Whisk in eggs, egg yolk, and vanilla extract. Add cocoa powder, flour (spooned and leveled), and salt and stir until just combined (do not overmix). Fold in chocolate chips or chopped chocolate. The filling thickens quickly, so immediately place it in the prepared crust.
Bake the Pie: Pour filling into the crust and spread it evenly. Bake for 25–30 minutes, until the edges are set but the center is slightly soft (like a brownie).
Add Marshmallows: Set oven to broil. Arrange marshmallows on top of the pie in a single layer, pressing them in slightly. Broil 1–2 minutes, watching closely, until marshmallows are golden and toasty. Do not leave it unattended as it can burn quickly!
Serve: Cool 30-45 minutes before serving, or let sit for longer for cleaner slices. Enjoy!
Notes
To make graham cracker crumbs, use your food processor or place graham crackers in a zip lock bag and smash with a kitchen mallet or rolling pin.
The filling should be slightly fudgy like a brownie so avoid overbaking it.
To serve, lightly grease your knife or dip in hot water before slicing to prevent sticky marshmallows from clinging.
Tryswapping semi-sweet chocolate for milk chocolate for a more traditional s’mores flavor, or add a pinch of espresso powder to deepen the yummy cocoa notes.
Nutritional information is approximate and was calculated using a recipe nutrition label generator and will vary based on cooking methods and brands of ingredients used. It does not including toppings.