Preheat the oven to 350°F and prepare a muffin tin with cupcake liners.
In a large mixing bowl, add the cake mix, butter, milk and stir until combined.
Scoop batter into cupcake liners until they are 3/4 of the way full.
Bake for 20 minutes.
Remove from oven and allow to cool completely before frosting.
Chocolate Ganache Directions
Bring the heavy cream to a slow boil in a small ssaucepan.
Place the chocolate chips into a heat-safe bowl, then pour the hot cream over the chocolate chips.
Allow to sit for a minute to melt the chocolate, then whisk until fully melted and smooth.
Marshmallow Frosting Directions
Prepare a double broiler and in a separate bowl, mix all ingredients except the vanilla.
Combine all marshmallow frosting ingredients except vanilla in the bowl of a stand mixer.
Place the bowl over the prepared double broiler.
Start to simmer the water and heat the mixture until a candy thermometer reaches 165℉ and all the sugar has dissolved (about 5-10 minutes after the water begins to simmer).
Stir as you heat mixture for even cooking.
Once all the sugar has dissolved and the mix is 165℉, remove from heat and place the bowl in a standing mixer
Mix on medium-high for 5-7 minutes until the egg whites stiffen up and the mixture starts to cool.
As the mixture begins to stiffen, add the vanilla extract.
Assembly Directions
First, use a large ice cream scoop to place a mound of chocolate ganache onto each cupcake.
Scoop the marshmallow frosting into a frosting bag, then pipe a layer of marshmallow on top of the ganache.
If you have a kitchen torch, use it to toast the marshmallow frosting. You could also use a multi-purpose lighter.
Place a cookie on top of the marshmallow frosting and press it gently to set.
Notes
Note: Nutrition information is a rough estimate only; actual values will vary based on the exact ingredients used and amount of recipe prepared.