In a bowl, add Greek yogurt, unsweetened cocoa powder, allulose, and an egg.

Mix all the ingredients well until smooth.

Pour the batter into paper cups and tap them on a surface to remove air bubbles.

Bake in an air fryer at 180°C (356°F) for 15 minutes.

Let the cakes cool, then chill in the refrigerator for about 3 hours.

Once chilled, remove the cakes from the paper cups.

Top with additional Greek yogurt and grated unsweetened chocolate before serving.