Grease a microwave safe bowl with cooking spray. In a small bowl, add the protein powder, baking powder, coconut flour, cinnamon, and mix well.
In a small bowl, add the protein powder, baking powder, coconut flour and cinnamon, and mix well. Add the maple syrup, egg, milk, and vanilla extrac. If the batter is too crumbly, continue adding milk of choice until a very thick batter is formed.
Transfer the mixture to a microwave safe mug and sprinkle the brown sugar and extra cinnamon and swirl over the top.
Microwave for 60 seconds, or until just cooked in the centre. Top with glaze and enjoy!