Κλασικά μίνι ντόνατς στο φούρνο (Baked Mini Doughnuts)!
unsalted butter, at room temperature • fresh milk, at room temperature (60 ml) • granulated sugar (65 grams) • large egg, at room temperature • salt • ground nutmeg, or more to taste • vanilla extract • baking powder • all-purpose flour (85 grams) • powdered sugar (40 grams) • little cinnamon, optional