Separate the egg yolks and whites.
Add erythritol to the yolks and mix well.
Whip the egg whites until stiff peaks form.
Add almond flour and baking powder to the yolk mixture and mix.
Fold the meringue into the batter in 2-3 portions.
Spread the batter evenly on a baking pan and bake at 170°C for 20 minutes.
Let the baked sheet cool and cut it thickly.
Mix mascarpone cheese, Greek yogurt, erythritol, and vanilla extract to make the cream.
Soak the baked sheet in espresso.
Layer the soaked sheet and cream in a container.
Repeat this process 2~3 times.
Finally, sift unsweetened cocoa powder over the top of the cream.
Let set in the refrigerator for at least 2 hours.