Preheat the oven to 350°F. Lightly grease a donut pans (6 donut cups) with coconut oil. Make sure you coat the center!
In a large mixing bowl, combine the cassava flour, cacao powder, coconut sugar, baking powder, and salt. Stir to mix.
Add the avocado oil, egg, water, and mint extract. Stir until a smooth batter forms.
Spoon the batter into the donut pans and divide it evenly into the 6 donut cups.
Bake for 15-18 minutes. Cool for 3 minutes before removing the donuts from the donut pans and letting them cool on a wire rack.
Cool completely before topping with melted chocolate chips or a chocolate glaze!
Chocolate Glaze
Combine the powdered sugar and cacao powder in a medium bowl. Add 1 T. of milk and stir to mix. Gradually add a little more milk at a time until a thick glaze forms.
Spread the glaze over each donut. Allow the glaze to harden before storing or serving.