Makes 24 regular cupcakes or 12 jumbo
1 box Triple Chocolate Cake Mix
3 teaspoons instant espresso coffee
Preheat oven to 350 degrees F. Combine ingredients listed on cake mix according to directions reserving 1/3 cup water. Mix the 1/3 cup water with the espresso. Once dissolved stir into cake batter. Fill cupcake liners 3/4 of the way full and bake according to directions on box.
Remove from oven and allow to cool completely.
Swiss Meringue Buttercream -
4 large egg whites
1 1/4 cups sugar
8 ounces butter
1 tablespoon vanilla extract
5 tablespoons nutella
Combine the egg whites and sugar into a heatproof bowl and whisk over a saucepan of simmering water until sugar is dissolved and the mixture is as hot as you can get without the egg whites cooking.
With the whisk attachment on your mixer, whisk the egg white and sugar mixture on high speed until a stiff meringue is formed and the mix has cooled down to room temperature.
Now put the paddle attachment on your mixer and with the mixer on a low speed add a tablespoon or two of butter at a time. Once all the butter is incorporated turn the mixer up to medium speed and mix until the mixture is light and fluffy again.
Add the vanilla extract and Nutella and mix on medium speed until the buttercream is a good piping texture.
Assembling the cupcakes -
Once the cupcakes have cooled, cut out a portion of each cupcake and insert a teaspoon of Nutella and a roasted hazelnut. Replace the portion of cupcake and then top with a swirl of Nutella Swiss Meringue Buttercream and chopped hazelnuts. Then drizzle some melted dark chocolate over the top or melted Nutella, and finally top with half of a Ferrero Rocher.