To make batter & bake doughnuts: Preheat oven to 400 degrees F. Thoroughly coat the molds of 2 mini-Bundt pans with cooking spray. Sprinkle molds evenly with 2 tablespoons granulated sugar, shaking out excess. (If you only have one pan, bake the recipe in 2 batches.)Advertisement
Whisk together flour, cocoa, baking powder, baking soda and salt in a mixing bowl. Whisk egg and egg white in another bowl until frothy. Add brown sugar and the remaining 1/2 cup granulated sugar; whisk until smooth. Add yogurt (or buttermilk), oil and vanilla and whisk until blended. Add the dry ingredients and stir with a rubber spatula just until moistened.
Spoon about 2 tablespoons of batter into each prepared mold, smoothing the surfaces with a small spoon. Bake until the tops spring back when touched lightly, 8 to 10 minutes. Loosen edges and turn the doughnuts out onto a wire rack to cool. (If baking in 2 batches, cool the pan, clean it, then recoat it with cooking spray or oil and sugar.)
To make glaze: Whisk confectioners' sugar, vanilla and enough of the milk to make a smooth, thick glaze. When the doughnuts are completely cool, set them, fluted-side up, on a wire rack over wax paper. Spoon some glaze over each doughnut, letting it drip down the sides. (Alternatively, dip the doughnuts in glaze.) Let stand until glaze has set.
Equipment: 2 mini-Bundt pans
3 other carbohydrate, 1 fat