Whisk the egg, coconut milk, olive oil, vanilla and xylitol in a microwave safe coffee cup.
Add the chia meal (blend 2 tbsp seeds in a blender to make the meal), protein powder, cinnamon, baking powder and salt. Stir until fully blended and thick.
Microwave for 1 minute. You will see the muffin rise to the top of the mug but it will collapse towards the end and stay below the rim. Remove from the mug by tapping upside onto a plate. Sometimes it may stick so use a knife to gently go around the outside edges of the muffin where it may be sticking to the mug.
Slice and enjoy immediately. Delicious with a tablespoon of unsweetened jam, cream cheese or both!