This limited time offer from Sonic is a smashburger with bacon, American cheese, fried onions and mustard on a pretzel bun.
Sonic Pretzel Bacon Sonic Smashers contain between 850-1030 calories, depending on your choice of size. The size with the fewest calories is the Double Pretzel Bacon Sonic Smasher (850 calories), while the Triple Pretzel Bacon Sonic Smasher contains the most calories (1030 calories).
Choose from the sizes below to see the full nutrition facts, ingredients and allergen information.
