Ingredients for - Secret Ingredient Smoothie

1. Chopped romaine lettuce 3 cups
2. Milk, or more as needed ⅓ cup
3. Frozen strawberries, or more to taste 4
4. Frozen banana, cut into chunks 1
5. Vanilla extract, or to taste (Optional) ¼ teaspoon

How to cook deliciously - Secret Ingredient Smoothie

1 . Stage

Put romaine lettuce into the bottom of a blender pitcher; add enough milk to cover completely and blend on High until smooth.

2 . Stage

Drop one strawberry at a time into the blender while still running on High and allow the berry to blend completely before adding the next. Blend one banana chunk at a time into the mixture in the same manner as the strawberries. Thin the smoothie with additional milk to keep smoothie blending properly. Blend vanilla extract into the smoothie.