Water, liquid egg whites (the kind in the carton, yes it is safe to drink, it's pasteurized just like milk), organic cocao powder, and whatever else. This is usually my base. At this point it tastes like an unsweetened chocolate drink. Not bad. You can then add spinach, peanut butter, frozen fruit, your choice green supplement, psyillium husk, golgi berries, seriously whatever. In my opinion, I would stay away from protein powders. There are waaaay too many unnecessary ingredients. Why make your body process all that shit? You can't go wrong with liquid egg whites. You can add unsweetened almond milk as well but water is completely fine. Try it out and experiment. Other proton sources could be natural peanut butter or PB2, chia seeds, hemp seeds, flax seeds, etc.