1 Medium mixing bowl used for combining graham cracker crumbs, sugar, and butter
1 Large heatproof bowl or small saucepan for melting the butter used in the brownie batter
1 Whisk helps blend the batter until smooth and glossy
1 Silicone spatula ideal for folding in chocolate chips and spreading thick batter
1 9-inch pie dish standard depth and left ungreased for easy crust release
1 Wire cooling rack allows airflow underneath the pie for even cooling
1 Microwave or stovetop either method works for melting butter safely
1 Oven with broiler option used to bake the pie and toast marshmallows if deeper color is desired
Ingredients
225ggraham cracker crumbsfinely crushed for even packing
63ggranulated sugarused to lightly sweeten the crust
106gunsalted butter meltedslightly cooled after melting
141gunsalted buttercut into pieces for easy melting
38mlvegetable oil or melted coconut oiladds moisture to the brownie
250ggranulated sugarfully dissolved for a smooth batter
3large eggsbrought to room temperature
1large egg yolkadds richness and chew
2 ½teaspoonsvanilla extractpure extract preferred
78gunsweetened cocoa powdernatural or Dutch-process both work
78gall-purpose flourspooned and leveled for accuracy
⅓teaspoonsaltbalances sweetness
225gsemi-sweet chocolate chipsevenly distributed throughout batter
30large marshmallowspressed gently so they adhere
Instructions
Set the oven to 350°F (177°C) so it is fully heated before baking.
Combine the graham cracker crumbs and sugar in a bowl, then stir in the melted butter until the mixture looks sandy and cohesive.
Transfer the crumb mixture to an ungreased 9-inch pie dish and gently press it across the bottom and up the sides using light pressure until compact but not hard.
Melt the butter in a heatproof bowl until just liquefied, then whisk in the oil and sugar and let the mixture cool briefly for a few minutes.
Whisk in the eggs, egg yolk, and vanilla until smooth and fully blended.
Add the cocoa powder, flour, and salt, whisking until a thick batter forms with no dry pockets remaining.
Fold in the chocolate chips, then immediately spread the batter evenly into the prepared crust.
Bake the pie for 33 minutes until the edges are set but the center remains slightly soft.
Carefully remove the pie and arrange the marshmallows over the surface, pressing them lightly into the batter so they stay in place.
Return the pie to the oven and bake for an additional 3 minutes, or briefly broil until the marshmallows are toasted to your liking.
Remove from the oven and allow the pie to cool on a rack for at least 45 minutes, preferably longer for neat slices.
Notes
This pie captures everything cozy about classic s’mores with a bakery-style finish. Letting it cool fully rewards you with clean slices and deep chocolate flavor. Perfect for gatherings when you want comfort and nostalgia in every bite.