Add all the ingredients to a blender and puree for about 30 seconds.
Taste to adjust flavor and serve immediately.
Notes
Make sure to wash your spinach before you use it in a smoothie.
Frozen fruit will make the smoothie more creamy and thick.
To store: You can store the pineapple green smoothie for an extra day in the fridge but you'll have to give it a mix as the smoothie may separate in the fridge.
To freeze: Freeze the smoothie in an airtight container with some space on top as the smoothie will expand.