Preheat the oven to 180°C.
In a bowl, mix together almond flour, unsweetened cocoa powder, baking powder, and salt.
In a separate bowl, whisk together eggs, Greek yogurt, erythritol, and vanilla extract.
Combine the dry and wet ingredients and mix well.
Pour the batter into a donut mold.
Bake in the oven at 180°C for 15 minutes.
After cooling, sprinkle unsweetened cocoa powder on top to finish.