Preheat your oven to 350°F (175°C). Lightly grease your 6-compartment donut pan with oil or cooking spray (even if it's non-stick — this helps with easy release).
In a medium bowl, whisk together the dry ingredients: flour, pb flour, sugar, baking powder, baking soda, and nutmeg.
1 ¼ cups all-purpose flour, ¼ cup peanut butter powder, ½ cup brown sugar, 1 teaspoon baking powder, ½ teaspoon baking soda, ¼ teaspoon ground nutmeg
In a separate bowl, whisk the wet ingredients: yogurt, almond milk, peahut butter, melted coconut oil, and vinegar. Mix until well combined.
⅓ cup coconut yogurt, ⅓ cup almond milk, 1 tablespoon creamy peanut butter, 1 tablespoon coconut oil, 1 tablespoon apple cider vinegar
Combine the wet and dry ingredients. Stir gently with a spatula or spoon until just combined — do not overmix! The batter will be thick but spoonable (like muffin batter).
Use a tablespoon to distribute the batter into the donut compartments, filling them generously and equally. Use 3 tablespoons of batter per compartment for smaller donuts and 4 tablespoons of batter for thicker donuts.
Bake for 12–15 minutes, or until the tops are set, lightly golden, and a toothpick inserted into the thickest part comes out clean or with just a few moist crumbs. Let the donuts cool in the pan for 5 minutes, then gently turn them out onto a wire rack to cool.