Preheat the oven to 180°C.
Combine almond flour and baking powder in a bowl.
Cut cold butter into small pieces and mix gently by hand.
Add erythritol, salt, and yuzu jam.
Add egg and unsweetened plain yogurt, and quickly knead the dough.
Shape the dough into a round and place it on parchment paper.
Cut into individual portions and bake in the oven for 20 minutes.