Add all the ingredients to a blender. Blend on high until well combined.
Notes
The frozen cauliflower rice thickens the smoothie without a banana, so the lemon flavor shines through. Don't worry, you won't be able to taste it.
Add 2 teaspoons pure maple syrup or 1-2 pitted Medjool dates if you prefer a sweeter smoothie.
If using fresh cauliflower rice instead of frozen, add ice for better texture.
For a thinner consistency, add more milk.
For nut-free be sure to use a nut-free milk like oat milk, coconut milk or hemp milk.
For vegan, be sure to use a plant-based protein powder.
For paleo, be sure to use a paleo-friendly protein powder.
Nutrition information calculated using almond milk, full-fat Greek yogurt and protein powder. Nutrition information will depend on the type of protein powder and yogurt you use.
For more ingredients & substitutions, see blog post above.