Step 1

Preheat the oven to 350 degrees F. Spray a doughnut pan with cooking spray or line a 24 cup mini muffin tin with liners.

Step 2

In a large bowl, combine the dry ingredients (flour through salt). Set this bowl aside.

Step 3

In a medium bowl, whisk together the remaining doughnut ingredients (egg through vanilla extract). Add this mixture to the bowl with the dry ingredients and stir, just until combined.

Step 4

Spoon the batter into the prepared pan, filling between 3/4 and full.

Step 5

Bake for 12 - 14 minutes or until a toothpick inserted in the middle of a doughnut comes out clean. Let the doughnuts sit for a minute and then remove from the pan. Turn out onto a wire rack to cool.

Step 6

While the doughnuts are cooling, mix the granulated sugar and cinnamon together in a medium bowl. Melt the butter in another bowl big enough to dunk the doughnuts in. While the doughnuts are still warm, dip the tops of the doughnuts into the butter and then sugar. Serve immediately or store, covered in an airtight container, for up to three days.