Preparation

• Preheat oven to 350°F (177°C). Spray a donut pan with non-stick spray. Set aside.
• Make the donuts: Whisk the flour, baking powder, baking soda, salt, cinnamon, and nutmeg together in a medium bowl. Set aside. Whisk the egg, brown sugar, milk, and yogurt together until smooth. Add the melted butter and vanilla, whisking until fully combined. Pour the wet ingredients into the dry ingredients and mix until just combined. Do not overmix. The batter will be very thick.
• Spoon the batter into the donut cavities—I highly recommend using a large zipped-top bag for ease. Cut a corner off the bottom of the bag and pipe the batter into each donut cup, filling ⅔ to ¾ of the way full.
• Bake for 9-10 minutes or until the edges are lightly browned. Allow to cool for about two minutes and transfer to a wire rack set on a large piece of parchment paper or on a large baking sheet. Bake the remaining donut batter (there is usually enough batter for 1-2 more donuts) and once baked, transfer to the wire rack. Cool donuts for at least 10 minutes before topping.
• Top the donuts: Combine the sugar and cinnamon in a medium bowl. Dip the donuts in the melted butter, then dunk into the cinnamon sugar mixture coating all sides.
• Donuts are best served immediately. Leftovers keep well covered tightly at room temperature for up to 2 days.