Step 1

Preheat oven to 425 degrees. Lightly brush two standard donut pans with butter. In a medium bowl, whisk flour, baking powder, baking soda, nutmeg, and salt; set aside.

Step 2

In the bowl of a stand mixer fitted with the paddle attachment, or in a large bowl with a hand mixer, beat butter and sugars on high speed until light and fluffy, about 3 minutes. Reduce mixer speed to medium; add eggs and vanilla, beating until combined, scraping down the sides of the bowl as needed. Reduce speed to low. Add flour mixture in two batches, alternating with milk, and beat just until combined.

Step 3

Transfer batter to a piping bag or a resealable plastic bag, and snip a 1/2-inch hole in one corner of bag. Divide mixture evenly between prepared pans. Bang pans several times on counter to release air bubbles.

Step 4

Bake until tops of donuts spring back when lightly pressed, 12 to 14 minutes. Let cool 10 minutes, then transfer to a wire rack to cool. To decorate, see Variations below.