01 -
Preheat the oven to 350°F. Lightly grease a donut pan with butter or non-stick cooking spray.
02 -
In a large mixing bowl, whisk together the flour, granulated sugar, baking powder, salt, and ground cinnamon until thoroughly combined.
03 -
In a separate bowl, whisk together the melted butter and egg until evenly blended.
04 -
Gradually fold the wet ingredients into the dry mixture, stirring just until combined and a smooth batter forms. Avoid overmixing.
05 -
Spoon the batter evenly into the prepared donut pan, filling each cavity about two-thirds full.
06 -
Bake on the center rack for 18 minutes, or until the donuts are golden brown and a toothpick inserted into the center comes out clean.
07 -
Allow the donuts to cool in the pan for 5 minutes before transferring to a wire rack. If desired, toss warm donuts in cinnamon sugar or drizzle with glaze.