Preheat oven to 350℉ and spray the donut pan with cooking spray.
Place all of the dry ingredients into a bowl and mix to combine.
Add all of the wet ingredients, minus the coconut oil, into a separate bowl and mix to combine.
Slowly add the dry ingredients to the wet. Once combined, whisk the coconut oil into the batter.
Transfer the batter to a piping bag and pipe it into the donut pan.
Bake for 10 minutes or until a toothpick inserted comes out clean.
Remove from the oven and cool for 5 minutes, then transfer to a wire rack.
While the donuts are cooling, make the glaze. Add the PB2, cocoa powder, and melted coconut oil to a bowl and stir to combine. Add water 1 tablespoon at a time to desired consistency.
Dip the donuts into the chocolate and place back on the wire rack to harden.