Sonic Peanut Butter Fudge Shakes contain between 760-1940 calories, depending on your choice of size. The size with the fewest calories is the Mini Peanut Butter Fudge Shake (760 calories), while the Large Peanut Butter Fudge Shake contains the most calories (1940 calories).
Choose from the sizes below to see the full nutrition facts, ingredients and allergen information.
