Preheat the oven to 180℃ (356℉).
Combine almond flour, erythritol, baking powder, and salt in a bowl.
Add egg, coconut oil, vanilla extract, and Earl Grey tea bag powder, then mix well.
Chop dark chocolate and mix evenly into the dough.
Scoop the dough into round shapes and place on a baking pan.
Bake in the oven at 180℃ for 12 to 15 minutes.
Let cool before serving.