Yeah, the standard variations in shakes tend to be about combining a (usually fairly limited) number of ice-cream types and some syrups to get permutations (so one could easily get a dozen types of banana milkshake, for instance). Each permutation can be its own recipe, but it’s still a permutation. You can expand the list out beyond that by also throwing in bit of various other desserts (e.g. custard, pie, cakes), or by actually adding some new, interesting flavors - Gibson’s and Taylor’s get the totally crazy number of variations by doing both to some degree. It appears Gibson’s also does frozen yogurt, vegan, alcoholic and fruit/vegetable smoothies to expand options out as well, so they’re increasing their numbers with substitutions, essentially. Taylor’s has bigger selection by simply doing a greater number of more straightforward permutations, though, it looks like.
Ooof. Sympathies. (Though I haven’t had a milkshake in years, myself, so good gods am I craving one now…)
