Dark Chocolate Cupcakes with a fluffy marshmallow filling and creamy chocolate frosting. These dangerously decadent cupcakes are sure to delight any chocolate lover.
Ingredients
For the Cupcakes:
8tablespoonsunsalted butter, cut into 4 pieces
2ouncesbittersweet chocolate, chopped
1/2cupDutch-processed cocoa powder
3/4cupall-purpose flour
1/2teaspoonbaking soda
3/4teaspoonbaking powder
2eggs
3/4cupgranulated sugar
1teaspoonvanilla extract
1/2teaspoontable salt
1/2cupsour cream
For the Marshmallow Filling:
6tablespoonsunsalted butter, softened
1 ½cupsconfectioners’ sugar
¾cupMarshmallow Fluff
1 ½tablespoonheavy cream
For the Creamy Chocolate Frosting:
1/3cup2 1/3 ounces granulated sugar
2large egg whites
pinchtable salt
12tablespoons1 1/2 sticks unsalted butter, softened and cut into tablespoon pieces
6ouncesbittersweet chocolate, melted and cooled to 85-100 degrees
1/2teaspoonvanilla extract
Instructions
Adjust oven rack to lower-middle position and preheat to 350 degrees F. Line muffin pan with baking cup liners.
In a medium heatproof bowl, combine butter, chocolate, and cocoa. Set bowl over saucepan containing barely simmering water; heat mixture until butter and chocolate are melted and whisk until smooth and combined. Set aside and cool until just warm to the touch.
In a small bowl, whisk flour, baking soda, and baking powder; set aside.
In a medium bowl, whisk eggs; add sugar, vanilla, and salt until fully incorporated. Add cooled chocolate mixture and whisk until combined. Sift one-third of flour mixture over chocolate mixture and whisk until combined; whisk in sour cream until combined. Sift remaining flour mixture over chocolate mixture and whisk until batter is combined.
Divide the batter evenly among muffin pan cups. Bake 18 to 20 minutes or until toothpick inserted into center of cupcakes comes out clean.
Cool cupcakes in muffin pan on wire rack for 15 minutes. Carefully lift each cupcake from muffin pan and set on wire rack. Cool to room temperature.
To make the marshmallow filling: in a medium bowl beat together the butter, confectioners’ sugar, Marshmallow Fluff and 1 ½ tablespoons of the heavy cream on medium speed until fluffy. Transfer to a pastry bag fitted with a ¼ – inch plain round tip.
Once cupcakes have cooled, use a paring knife or apple corer to cut out a small circle in the center of each cupcake.
Remove the core and trim leaving the core just big enough to be used to plug the hole once it is filled.
Pipe the marshmallow filling into each hollowed cupcake.
Once the filling is in place, place the trimmed core of the cupcake back into place.
To make the frosting: combine the sugar, egg whites, and salt in the bowl of a stand mixer. Set over a small saucepan of simmering water, and whisking constantly, cook until the mixture is slightly thickened, foamy, and registers 150 degrees on an instant read thermometer, 2-4 minutes.
Attach bowl to the stand mixer and fit the whisk attachment, beat at medium speed, until mixture is the consistency of shaving cream and slightly cooled, 1-3 minutes. Add butter 1 piece at a time, until smooth and creamy.
Once all the butter as been added, pour in the cooled chocolate and vanilla. Mix until well combined. Increase speed to medium-high and until light and fluffy, another 30 seconds to a minute.