Post-workout is a lot easier than during and pre workout. In a post-workout supplement, you want something that will help with recovery, but also give you protein right then and there, and the answer is easy. It’s whey protein. Simple and effective, it gets the job done, below is my choice.
Optimum Nutrition 100% Whey Gold Standard is one of the best out there with 24g of protein per serving, and it’s instantized, which means there is no blender required.