I was going to post a green smoothie recipe then it turned out to be bitter and the colour ended up brown, not what you want in a smoothie at all. So now it is easy smoothie prep!
The best thing for this is to get lots of discounted fruit that is very ripe and freeze it for future smoothies. Strawberries can be sliced and put on a cookie sheet to freeze, same with peaches or other soft fruit. Berries can be just laid out on a tray or pre-blended. Put the berries of choice in a blender with a splash of water ( or even juice, milk, or milk alternative ) and blend until smooth, freeze in an icecube tray for easy cubes of fruit. I talk about freezing bananas in this post! Cubes and frozen fruit can be mixed and matched for different smoothie flavours.
Greens + avocado
I have recently discovered you can freeze avocado and it taste and look, perfectly fine! It saves a lot of avocados since I was throwing out overly ripe ones but now they can be frozen at prime time before they go bad. Throw a few ( I find 3 whole avocados fill 12 ice cubes ) avocados in a blender, again with a splash of water, and blend until smooth then put into trays. Another option is blending some leafy greens ( like spinach ) until it looks pretty smooth, then adding in the avocado, for quick and easy green smoothies!
Do you make smoothies from fresh or frozen fruit?