Flo's is one top-secret recipe you absolutely won't want to miss out on. Previously only sold out of a red shack in cape Neddick, me on top of natural casing frankfurters, loyal patrons would flock from all over the region to wait in long lines just for a taste of the alluring secret sauce. Delightfully sweet and sour, this mysterious Maine staple will not disappoint! Flo's hot dogs, a family-owned and operated business in cape Neddick, Maine specializes in steamed hot dogs. To go along with their "red snappers", Flo's created an incredibly popular and award-winning sauce, which is a secret recipe that has drawn in large crowds of loyal patrons for 60 years.