Put the spinach and milk into your blender and blend.
Add the remaining ingredients and blend again.
Pour into glasses and serve.
Notes
To get a super smooth smoothie, blend the liquid and greens first and then add the fruit and continue blending.
Using frozen fruit means that you can make this green smoothie all year round and use fruits that might not be in season.
Try to make the smoothie from fresh. However if you want to prep it in advance, then you can put everything except the liquid in a freezer bag and freeze until you need it.
The general rule of making a green smoothie is 1 cup greens, 1 cup liquid and 2 cups of fruit.
Don't use ice cubes to keep the smoothie cold, as it will dilute it. Use frozen fruit instead to keep it cool.
To make this smoothie creamier and add some extra flavor, swap 50ml/0.25 cup of the milk for coconut milk. This will really help to thicken the smoothie too. You could also add Greek yogurt.