Instructions

1. Preheat the oven to 175°C / 350°F
2. Spray muffin tins with nonstick cooking spray.
3. Sift the flour, baking powder, salt, and nutmeg into a medium bowl and set aside.
4. In a large bowl, using an electric mixer on medium speed, beat the butter and sugar until blended and creamy, about 2 minutes. Beat in the egg, mixing until smooth and thick.
5. On low speed, add the flour mixture in 3 additions and the milk in 2 additions, beginning and ending with the flour mixture and mixing just until the flour is incorporated and the batter looks smooth.
6. Fill each muffin cup about 1/3 full. Add a small dollop of Nutella. Top with more batter.
7. Bake for 16 minutes, or until the tops feel firm and a toothpick inserted in the center comes out clean
8. Cool the cupcakes for 5 minutes in the pan on a wire rack.
9. Place the melted butter in a medium bowl. In another medium bowl, stir the sugar and cinnamon together.
10. Carefully remove cupcakes from pan. Roll them in the melted butter, then in the cinnamon sugar to coat completely.