I don't know if it's just any protein shake mix, as some of them really don't take well to being cooked. DON'T use the one that you can buy in DECATHLON sports stores, this really goes horrible and salty when cooked. . I'm going to throw that stuff out because it's bloody useless

Plus they all have different sized scoops. I've made pancakes successfully with the chocolate soy protein shake mix from Holland and Barrets, but I didn't really follow a recipe, just kept adding ingredients until it looked edible

I'm sure I've seen the designer whey protein powder on one of the websites that sell to the uk, I'll have a look and post back if I'm successful