Preheat the oven to 180°C (356°F).
In a bowl, mix protein powder, almond flour, cocoa powder, and baking powder.
Add eggs, unsweetened almond milk, erythritol, and coconut oil, and make the batter.
Divide the batter into muffin molds.
Bake in the oven at 180°C (356°F) for 18-20 minutes.
Let cool completely before eating.