Preheat the oven to 350
Pulverize 2 cups of oats in the food processor to create oat flour. Add in baking soda and powder and salt and pulse to combine.
Add in nuts, chips, and last cup of oats and pulse 5-10 times to break them up.
In a pan, melt butter and banana together. Smash as you go until it's pretty smooth.
Remove from heat once warm and smooth and add the sweetener and nut butter (if using).
Add in your egg and vanilla and whisk until smooth before adding to your dry mix. Stir well until totally combined.
Scoop into tablespoon sized mounds into a greased or lined cookie sheet. Bake for 8-10 minutes. Allow to cool about 5 minutes on the tray before removing.