Note: 
Low cal, high protein, high fiber.
I used casein protein powder. You can use most protein powder exept
whey protein powder because this will give the cookie a dry, spongy
texture.
Nutritional facts (1 serving = 1 ‘oreo’ cookie):
Energy 65 cal
Protein 7.5 g
Carbs 4 g (sugar 0.4 g)
Fat 2.5 g (sat. 1.4 g)
Fiber 3.6 g

Recipe: