Question: are sonic drive-in milkshakes gluten free?
Answer: Sonic's shakes, which come with a huge variety of toppings, may be a better reason to go to the drive-in fast food restaurant. Many of the potential shake toppings are gluten-free (with the exception of obvious ones, such as Oreos, malt syrup, and pie crumb pieces, and not-so-obvious ones, such as Salted Caramel).