Graham Cracker Cupcakes filled with Marshmallow Fluff, topped with Chocolate Buttercream and Toasted Marshmallow Meringue - the perfect S'mores Cupcakes!
In a small bowl, stir together the graham cracker crumbs and granulated sugar. Add the melted butter and mix until well incorporated.
Preheat the oven to 350˚F and line a muffin pan or cupcake pan with liners. Press a spoonful of the Graham Cracker Crust into the bottom of each cupcake liner.
In a medium sized bowl, add the graham cracker crumbs, sifted cake flour, baking powder, baking soda, and salt. Whisk to combine and set aside.
In the bowl of a stand mixer with the paddle attachment, cream butter for one minute on high. Scrape down the bowl and paddle and add the sugar. Cream together on high for two minutes, scraping down the bowl and paddle once in between. Turn the mixer to low and add the egg and egg yolk until combined.
Add vanilla and mix on medium for one minute. Turn the mixer to low and add all of the dry ingredients at once until just combined, then add the milk all at once. Scrape down the bowl and paddle once more and mix on low for about 30 seconds. Do not overmix.
Pour batter on top of the graham cracker crust bottomed liners to fill no more than ⅔ full. Bake for 17 minutes or until a toothpick inserted comes out clean. Cool completely before filling or frosting.
In a stand mixer fitted with a paddle attachment, whip butter on medium speed until creamy and light in color, about four minutes. Scrape down the bowl and paddle and turn the mixer to low, then add powdered sugar, cocoa powder, milk, salt, and vanilla extract. Increase the speed to medium and beat for one full minute.
Whisk the egg whites, sugar, and cream of tartar together in a small heatproof bowl. Set the bowl over a saucepan filled with an inch or two of simmering water, making sure the bottom of the bowl doesn’t touch the water (or else it will cook your eggs!). Whisk the mixture constantly until the sugar has dissolved, about 4 minutes.
Once the sugar has dissolved, pour the mixture into the bowl of your stand mixer fitted with the whisk attachment. Add the vanilla and whisk the mixture on high for 6 full minutes, until stiff peaks form. You should be able to dip the whisk into the meringue and it forms a peak that maintains its shape when turned right side up and upside down.
Once the Graham Cracker Cupcakes are cooled, cut out the centers using a knife or inverted large piping tip. Fill the empty centers with Marshmallow Fluff. Fit a piping bag with Wilton tip 1M and fill it with Chocolate Buttercream, then pipe a swirl of chocolate buttercream on top of each cupcake. Sprinkle with graham cracker crumbs.
To get the look pictured, fit one piping bag with Wilton Tip 1M and another with Wilton Tip 4B. Fill both piping bags with Marshmallow Meringue. Pipe a small swirl with Wilton Tip 1M on top of each cupcake, then pipe two stars next to each small meringue swirl with Wilton Tip 4B. Toast the meringue accents (carefully!) with a culinary torch.
Make Ahead Tips:
The Graham Cracker Cupcakes can be made ahead and stored in an airtight container at room temperature for up to one day. Alternatively, you can place them in the freezer in an airtight container for up to one month before thawing and using.
The Chocolate Buttercream can be made ahead and stored in an airtight container at room temperature for up to 1 day. Alternatively, you can store it in an airtight container in the refrigerator for up to two weeks. When you’re ready to use it, bring it back to room temperature and rewhip with your stand mixer to bring back to frosting consistency.
The Marshmallow Meringue cannot be made ahead and must be made right before you're ready to pipe and torch it.