One should never mess with success. My first spinach smoothie was a success, so I made another one a little different and this one a lot different. Not so good...the main problem was I got this stuff called Amazing Grass superfood powder (because it has lots of good-for-you stuff in it, so I could put it in smoothies and stuff) and it is NASTY! I thought protein powder was bad, but you can't hide this stuff! It smells like very pungent earthy lawn clippings and tastes awful. I thought a smoothie would hide it but it did not. Otherwise, I think this version of a spinach smoothie would be good.
I used one yogurt, a banana, one scoop protein powder, frozen strawberries, and 4 cups spinach. Add water and enjoy (you won't have to plug your nose and drink it like I am...haha).