Squeeze the juice from half of a lemon into the blender.
Run the berries under cold water to wash them and thaw them a bit. Your blender will thank you.
Add the remaining ingredients to the blender in the following order: arugula, berries, protein powder, and water.
Blend on high until smooth and spinach pieces are very fine.
Pour into 2 12 oz jars. The extra can be made into popsicles.
Recipe Notes
Notes:
Smoothies will keep in mason jars for 3 days. Shake well before drinking. Extra smoothie can be poured into a popsicle mold and frozen to enjoy on a warm day.