To a bowl of a stand mixer fitted with a paddle attachment add the icing sugar, cocoa powder, and unsated butter. Beat at medium speed until the mixture looks like fine breadcrumbs.
With the mixer’s motor running at low speed slowly pour the cream into the frosting mixture. Once all the cream has been added increase the speed of the mixer to medium-high speed and beat for 5 minutes.
Use a rubber spatula to scrape down the sides of the bowl and beat the frosting again at medium-high speed for a couple of minutes until light, fluffy, and the perfect consistency.
Add the Nutella to the whipped frosting and beat again until well combined, scraping down the sides of the bowl if needed.
The frosting is now ready to be filled into a piping bag or spread onto cakes. Enjoy!