Finely grind the oats to prepare.
In a bowl, mix oat flour, almond flour, cocoa powder, stevia, and baking powder.
Add eggs, Greek yogurt, and vanilla extract, then knead into a dough.
Shape the dough into triangles, place parchment paper on the oven pan, and put the dough on top.
Bake in a preheated oven at 180°C for 20 minutes.
Let it cool to finish.