1 Frozen Banana, 3 Oz Vanilla Yogurt, 1/4 Cup Milk, Little Less Than 1/4 Cup Peanut Butter = 1 Protein Rich Creamy Smoothie. April 3, 2015 by lillyfisher 1 Frozen Banana, 3 Oz Vanilla Yogurt, 1/4 Cup Milk, Little Less Than 1/4 Cup Peanut Butter = 1 Protein Rich Creamy Smoothie.