"This is my fancy version of a peanut butter and jelly smoothie. It's bursting with vitamins, minerals, and protein. You can use peanut butter in this recipe, but it kind of clashes with the berry flavor. Cashew butter is milder and seems to compliment well. I make my own cashew-walnut-macadamia nut butter, and it's stellar in this smoothie! This recipe is very versatile; this is just my favorite way to prepare it, although I don't always add the banana. Either way, enjoy experimenting with this healthy and flavorful smoothie!"