I love this recipe because it’s not only easy, but also makes “single-servings” (3 cookies). It’s also a great snack you can have at work and eat on the go: one cookie and you're satisfied for hours!
It took me almost 10 minutes to get them baked, but I believe this depends on the thickness of the cookie and also on the kind of whey you use. You just have to keep an eye on them after 5 minutes in the oven.
NOTE: Do NOT take whey protein without medical advice. Talk to your doctor or nutritionist before you buy any. I take it very sparingly and also at my own risk.
From Protein Cakery