Combine Greek yogurt and eggs in a bowl and mix well.
Add allulose syrup and vanilla extract, then mix again.
Sift almond flour, baking powder, and cocoa powder into the bowl and mix evenly.
Chop dark chocolate into small pieces and gently fold in.
Pour the batter into a baking pan.
Bake in a preheated oven at 170°C for 30 minutes.
After cooling, decorate with Greek yogurt and fruit.