Chocolate Nutella cake is a delicious dessert anyone who loves chocolate and hazelnut will go crazy for!
You want your butter to be at room temperature when you make this frosting so it combines easily with the Nutella. Cut your butter into tablespoon-sized pieces and let it sit at room temp for 20 to 30 minutes. Room temp butter should give a bit when pressed with your finger, but not mush completely.
If you don’t have piping bags and a large round tip to pipe a buttercream dam when you assemble your cake, you can still make the cake. Spread the ganache over the cake without going all the way to the edge, and use only a very thin layer.