Mix almond flour, erythritol, baking powder, and cocoa powder in a bowl.
Add eggs, almond milk, and melted coconut oil, then mix well.
Divide the batter into muffin molds.
Bake in a preheated oven at 180°C for 20 minutes.
Once the muffins have cooled completely, coat them with melted dark chocolate.
Refrigerate until the chocolate hardens.