Preheat the oven to 200 degrees.
In a food processor, scoop off one avocado in it, add cocoa powder, yogurt, sweetener, and egg
Process the ingredients until smooth and creamy
Add oat flour and baking powder, I added a combination oat flour and instant oat for a little bit of texture.
Process until smooth and thick, add chopped nuts of your choice, and toss with the cookie batter. You can also add raisins or dried cranberries if you want to
Bring a baking sheet and cover with parchment paper. Scoop the batter using a medium sized ice cream scoop or a full tablespoon.
Place separately on the baking sheet and bake for 15 to 20 minutes or until it's firm on the outside, slightly cracked, and moist on the inside.
Let the cookies cool before serving.