- MOCHA CUPCAKES:
- 6 tbsp unsalted butter, room temperature
- 3/4 cup sugar 155g
- 6 tbsp sour cream, room temperature
- 1/2 tsp vanilla extract
- 3 large egg whites room temperature, divided
- 1 1/4 cups all-purpose flour 163g
- 2 tsp baking powder
- 1/4 tsp salt
- 2 tbsp hot water
- 3 tbsp instant espresso coffee powder
- 6 tbsp milk, room temperature
- NUTELLA FROSTING:
- 1/2 cup salted butter, room temperature
- 1/2 cup vegetable shortening
- 4 cups powdered sugar, divided
- 3/4 cup chocolate hazelnut spread, such as Nutella
- 5 tbsp water or milk
Mocha Cupcakes:Preheat the oven to 350°F (176°C) and prepare a cupcake pan with cupcake liners.
In a large mixing bowl, cream the butter and sugar until light in color and fluffy, about 3 to minutes. Add the sour cream and vanilla extract and mix until well combined. Add 1 of the egg whites and mix until well combined. Add the remaining 2 egg whites and mix until well combined. Scrape down the sides of the bowl as needed to be sure all the ingredients are well incorporated.
Combine the flour, baking powder and salt in a medium bowl.
Combine the hot water and espresso coffee powder in a small measuring cup, then add the milk. Add half of the flour mixture to the batter and mix until well combined. Add the milk mixture and mix until well combined. Add the remaining flour mixture and mix until well combined. Scrape down the sides of the bowl as needed to be sure all the ingredients are well incorporated.
Fill the cupcake liners about halfway with batter. Bake the cupcakes for 16 to 18 minutes (mine were done at 14 minutes, so check early on!), or until a toothpick inserted comes out with a few crumbs. Remove the cupcakes from the oven and allow them to cool for 2 to 3 minutes, then transfer them to a cooling rack to finish cooling.
Frosting:To make the frosting, beat the butter and shortening in a large bowl until smooth. Add 2 cups (230 g) of the powdered sugar and mix until smooth. Add the Nutella and water or milk and mix until well combined. Add the remaining 2 cups (230 g) powdered sugar and mix until smooth.
Cupcakes can be stored in the refrigerator or frozen, or kept at room temperature for up to 2-3 days..