Preheat the oven to 350 degrees F. In a medium bowl, cream the butter and the sweetener until very smooth.
Add in the eggs. In another bowl mix together the coconut flour, protein powder (if option 1), salt and baking powder.
Slowly add in the dry ingredients into the wet, then add in the vanilla. Stir until a thick dough forms.
Cover and place in fridge to chill the dough for 1 hour or overnight.
Place a sheet of parchment on counter, then spray with avocado oil spray.
Place dough on greased parchment, push the dough down a bit, and spray with another layer of coconut oil.
Top with another sheet of parchment. Roll the dough out with a rolling pin until a long rectangle shape (9×12) or so. Then remove the top layer of parchment.