B.Z.
We make smoothies all the time in our house, but I never did it with spinach! Thanks for the idea!
If you are adding dairy, we go with plain yogurt and milk. What I found is that adding vanilla extract gives a fuller flavor; otherwise, the smoothie tastes boring.
When we skip the dairy, we use a berry juice (i.e. pomegranate or acai). Usually the vanilla isn't required in this case, but I sometimes have to blend again with it if I'm not happy with the taste.
Our typical smoothie:
*Frozen blueberries (from Sams)
*Frozen peaches/mango/strawberries (from Sams)
*Carrot (I sneak it in if I have it on hand... shhh, don't tell my hubby)
*Plain yogurt
*Milk
*Ground flax seed
*Honey and vanilla to taste