The beauty of green smoothies is that they empower you to consume larger amounts of raw vegetables more easily. I particularly prefer this method of getting my dark green leafy veggies in  every single day -- without trying to chew on raw kale, collards, cabbage, etc......those are tough for me but they are so power packed and really important in detoxifying my body.....they are also a great source of so many vitamins, minerals, enzymes, water, fiber, and antioxidants. In fact, since I began incorporating green smoothies into my daily eating plan, I have consumed 2 bags of Kale, 1 savoy cabbage, 2-3 bags of spinach,  and 1-2 bags or chard every week.....in addition to lots of other fresh fruits and veggies that I add into these or my fresh veggie juices. Huge boost from the 2-3 servings of greens I was choking down in salads prior to this. 
The basic gist of a green smoothie is that you can take fresh organic greens and get their nutrients while tasting the sweetness of fruit instead of the expected bitter taste some of those veggies impart. 

I start out with 8 oz of filtered water in the blender followed by 4 oz of "chia gel" (2-3 T of chia seed soaked in a qt . of water). 
I then add my greens: 2 kale leaves, a handful of spinach, maybe a leaf or 2 of cabbage. 
1-2 T ground flax seed for my daily Omegas

Other ingredients depend on what I have:
1 golden delicious or gala apple OR pear, cored and chopped
1 banana
1/2 cucumber 
stevia packet or 1 T honey or agave

We travel a bit of a distance to church on Sunday's and by the time we get home it's nearly 2 or 3:00. I really don' usually feel like drumming up a meal at that point since we've typically been gone since 8 or 9:00 AM.....so we have created "Smoothie Sunday's". 
Lunch time is a plate of fresh fruit, veggies, hummus, crackers, and cheeses from the local farmer's market the day before and smoothies!
No better way to get green goodness into some kiddos who don't eat greens, much -- specially the two younger ones. 
This chocolate peanut butter version was a big hit the first time with everyone except Markie, who simply refuses to drink anything green...but that's another story.

Ingredients:
12 oz milk, almond milk, or rice milk -- your preference
2 generous handfuls organic spinach, rinsed and chopped
OR
1 generous handful of spinach and 2 organic kale leaves, de-veined, rinsed, and chopped
2 T all natural, organic peanut butter
2-3 organic bananas, frozen and chopped
1 T gd flax seed (optional -- provides 1200mg Omega 3)
2 T agave or raw honey
few dark chocolate chips (I actually use a small piece of Paul Newman's dark organic chocolate bar chopped)

Place ingredients in blender or Vita-mix if you are blessed to have one in the following order:
milk, greens, PB, sweetener of choice, bananas.........Blend together til well blended. Then turn off, add chips and blend a bit longer til the chips are distributed well. 
Enjoy!!!!