There’s nothing quite like the irresistible aroma of Cinnamon Sugar Donuts fresh out of the oven.
Preheat your oven to 350°F (175°C). Grease a 6-cavity donut pan well with butter or nonstick spray.
In a medium bowl, whisk together the flour, baking powder, baking soda, salt, and cinnamon.
In a separate bowl, whisk melted butter and sugar until smooth. Add in the egg, buttermilk, and vanilla extract. Stir until well combined.
Gently fold the dry ingredients into the wet mixture until just combined. Do not overmix.
Spoon the batter into a piping bag or zip-top bag with the corner snipped off. Pipe evenly into the greased donut pan, filling each cavity about ¾ full.
Bake for 10–12 minutes, or until the donuts spring back when lightly touched. Allow to cool in the pan for 5 minutes, then transfer to a wire rack.
While donuts are still warm, brush each with melted butter and roll in the cinnamon sugar mixture until well coated.
Keywords: Cinnamon Sugar Donuts