nonstick cooking spray
- 1/2 cup white sugar
- 1/3 cup butter, softened
- 1/4 teaspoon ground nutmeg
- 1/4 teaspoon salt
- 1 egg
- 1 1/2 cups all-purpose flour
- 2 1/2 teaspoons baking powder
- 1/2 cup milk
- 1/2 cup butter, melted
- 2/3 cup white sugar
- 2 teaspoons ground cinnamon
Preheat the oven to 350 degrees F. Spray 9 cavities of a 12-cavity doughnut pan with cooking spray.
Combine sugar, butter, nutmeg, and salt in a medium bowl; beat with an electric mixer until well combined. Add egg and mix until incorporated.
Combine flour and baking powder in a small bowl. Add flour mixture to butter mixture in batches, alternating with milk, beating batter briefly after each addition. Pour batter into a large resealable plastic bag. Snip off one corner of the bag and pipe batter into the 9 prepared cavities of the doughnut pan, filling each halfway.
Bake doughnuts in the preheated oven until a knife inserted into the center comes out clean, 7 to 9 minutes.
While the doughnuts are baking, place melted butter for topping in a shallow bowl. Mix together 2/3 cup sugar and cinnamon in another shallow bowl. Roll warm doughnuts in melted butter and then in cinnamon sugar to coat.