Combine all ingredients in a blender or food processor. Blend until smooth.
Add extra 2-3 ice cubes for a thicker smoothie. Taste for lemon juice and sweetness. Enjoy!
Video
Notes
Yogurt: 6 ounces is the size of most individual yogurt cups, but any 4-8 ounce yogurt will work. Replace with non-dairy yogurt if preferred. Lemon flavor yogurt is also delicious here.
Lemon zest isn't required but adds a great pop of lemon flavor.
Sweetness: For more sweetness add 1-2 teaspoons of liquid sweetener like maple syrup, honey or agave syrup.
Nutrition information is calculated using soy milk and 6 ounces of Greek yogurt.