I tried it in the Yoyonas maker. It turned out better when I blended the PB2 mix separately from the frozen bananas then just mixed it together when already smooth, otherwise it was lumpy for me, at least the first time I tried it. I also had success mixing 6 oz. frozen bananas, 10 oz. water, and 6 tbsp. peanut butter mix in a smoothie mixer, which turned into the consistency of a peanut butter milkshake.
i have never used it in a Yonanas maker...it doesn't reconstitute exactly like regular peanut butter but adds a wonderful flavor to smoothies, etc. you should probably add a little extra liquid as it does seem to absorb it. good luck and enjoy!