I've been drinking green smoothies for years, but I finally found the PERFECT recipe. I've branched out and now I use a spinach/kale/chard mix (usually Earthbound Organics Power Greens). I used to use fresh fruit, but frozen fruit tends to be cheaper and easier to work with. No more rinsing and slicing. I also don't need to add ice when I use frozen, so one less ingredient. I've also started adding coconut oil, because, well, coconut oil is just full of awesome. Just a bit of local, raw honey provides some sweetness. Oh, and did I mention that raw honey is a superfood? A scoop of green powder rounds it out. It really only takes a minute to throw the ingredients in a blender and the kids absolutely love it.
The brands I use are linked in the recipe, and no, I'm not an Amazon affiliate.