I used a high speed blender, and had to constantly scrape down the sides. Finally I gave up and added a little more coconut water, and then it sort of worked with more scraping down of the sides. I made half the recipe, and still got a generous cup out of it for two people, so I don't think the serving size is correct (I didn't add THAT much coconut water). For all that work, it was just okay. Too bad; the wheat grass juice was expensive. Maybe it would have been better with the toppings, or if it were hot and humid outside instead of overcast, but overall was disappointed.