makes 12 donuts
For the cinnamon swirl:
1/4 cup granulated sugar
1 teaspoon unsweetened cocoa powder
2 teaspoons ground cinnamon
For the crumble:
1/4 cup unbleached all-purpose flour
1 tablespoon granulated sugar
2 tablespoons brown sugar
1 teaspoon ground cinnamon
1/2 teaspoon nutmeg
3 tablespoons cold unsalted butter, cut into small cubes
For the donuts:
2 cups unbleached cake flour
2/3 cup granulated sugar
2 teaspoons baking powder
1/2 teaspoon fine sea salt
1 cup low-fat buttermilk
2 eggs
1/3 cup canola or vegetable oil
1 teaspoon vanilla extract
1. Preheat the oven to 350 degrees. Spray a donut pan with cooking spray and set aside.
2. Make the cinnamon swirl: In a small bowl, whisk together the sugar, cocoa powder, and cinnamon. Set aside.
3. Make the crumble: In a small bowl, whisk together the flour, sugars, cinnamon, and nutmeg. Cut in the butter with a pastry blender or two forks until crumbles form. Set aside.
4. Make the donut batter: Whisk together the dry ingredients. Add in the buttermilk, egg, oil, and vanilla extract. Stir until smooth.
5. Carefully spoon the donut batter into the prepared baking pan. Fill each cavity about 1/2 full.
6. Sprinkle the cinnamon swirl mixture evenly over top the batter. Then fill each cavity with the remaining batter. Sprinkle the crumble over top the batter in each cavity.
7. Bake for 10-14 minutes, or until the donuts just spring back when touched.
8. Allow the donuts to cool in the pan for five minutes. Then remove donuts from the pan and let cool on a wire rack.
9. Any remaining donuts can be stored in an airtight container at room temperature. Donuts are best eaten within two days.