Combine almond flour, matcha powder, baking powder, and salt in a bowl and mix well.
Add egg, unsweetened Greek yogurt, low-sugar chocolate chips, erythritol, and coconut oil, and mix thoroughly.
Shape the dough into a single mass and flatten it into a circle on parchment paper.
Cut the dough into 6 equal triangle pieces.
Bake in a preheated oven at 180°C for 15–18 minutes, then let cool.