Grind the oatmeal finely and set aside.
In a bowl, combine oatmeal, baking powder, salt, and sugar.
Add yogurt and half-Greek yogurt, then knead the dough.
Add chocolate chips and mix evenly.
Shape the dough into round or triangle shapes.
Place the dough on a baking pan and bake at 180℃ for 20–25 minutes.
Let cool before serving.