There are just so many directions to go. Depends on what you like.

I do different fresh fruit: Strawberries, blueberries are favorites.

Another is banana and peanut butter. Good for the guys that need to gain weight.

Another favorite is replace 1/3 the water with apple juice and add cinnamon. Tastes like an apple pie.

Google protein shake recipes and I’m sure you’ll get a ton more.