Combine almond flour and baking powder in a bowl.
Add erythritol, salt, eggs, melted butter, and unsweetened yogurt; mix into a dough.
Add yuzu marmalade and blend evenly.
Divide the dough into single serving portions.
Line a baking sheet with parchment paper and place the dough portions on it.
Bake in a preheated oven at 180°C for 20 minutes.