In a mixing bowl, pour in the oat flour, cocoa powder, natural sweetener, baking powder, and cinnamon. Give this all a mix.
Then, add the egg, low fat greek yogurt, and vanilla extract. Mix well until silky smooth.Pour the mixture into a cupcake style baking tray. Bake for 15 mins at 180 degrees.
To make the dusting, mix the natural sweetener with cinnamon. Dip in the cinnamon bites and coat to preference.