There are two kinds of smoothies, depending on if you have a powerful blender like a VitaMix. I don't own one, but the Nam's do so that's what we use around here right now. I found most smoothies work out fine with a regular blender, but you can't put raw fruits/vegetables in like you can with the VitaMix because the motors are not powerful enough.
Morning Smoothie
1 cup milk
1 scoop protein powder (we use the EAS brand from Costco which is a pretty decent nutrient profile minus the fact that it has some Splenda in it, but not enough for me to freak out)
1 cup frozen strawberries
1 cup other frozen fruit or one banana
---Blend it up.
Fruit and Vegetable Smoothie
1 cup fresh fruit
1 carrot
1 apple minus the core
1 cup frozen fruit
1 cup water
---Blend it up.
Enjoy!