Steak 'n Shake Peanut Butter Cup Milkshakes contain between 530-780 calories, depending on your choice of option. The option with the fewest calories is the Small/Kids Peanut Butter Cup Milkshake (530 calories), while the Regular Peanut Butter Cup Milkshake contains the most calories (780 calories).
Choose from the options below to see the full nutrition facts, ingredients and allergen information.
