Preheat oven to 325F (163C).
Mix cashew butter and egg white until combined.
Add protein powder, almond flour, erythritol, baking powder, and stevia, and mix to combine.
Fold in chocolate chips. You may need to use your hands.
Break into 6 pieces, and roll each into a ball.
Place on a parchment-lined cookie sheet and flatten each cookie.
Bake for about 8 minutes, or until firm.
Slide the parchment off the cookie sheet as soon as you remove the cookies from the oven (so they don't continue cooking). Let cool on a cookie rack.
Enjoy! Store leftovers in the refrigerator.