These Self-Frosting Nutella Cupcakes are magical; they essentially frost themselves up. No need to fuss over a separate frosting for these Nutella cupcakes. These baby cakes are tender, easy to make, and even taste like magic.
Preheat oven to 325F, with rack on lower middle position. Lightly grease muffin tin (or use liners.) In the bowl of a stand mixer fitted with paddle attachment (or use electric mixer,) cream together the butter and sugar on medium-high speed until light and fluffy, 2-3 min. Scrape down sides of bowl as needed. Add eggs and vanilla, beating until smooth and combined.
In another bowl, gently hand-whisk together the flour, baking powder, and salt. Use wooden spatula to gently stir in the flour mixture with the butter mixture, just until mixture is combined - don't over mix.
Fill each prepared muffin tin a little less than two-thirds full. (Be sure to leave some space at the tops of muffin tin, as the cupcakes will expand quite a bit.) Add 1 heaping teaspoon of Nutella on top of each cupcake and use a toothpick dip into the batter and swirl.
Bake 15-20 min, or just until a toothpick inserted in center comes out with a few tender crumbs attached (not fully clean.) Immediately sprinkle with your choice of sprinkles, if desired. Let cool on wire rack and serve.