bakechef
Executive Chef
I've lived in Massachusetts for 70 years and 99.99% of the shortcakes I've eaten have been made with these. You can buy them in any supermarket. I can't speak to what's common in Maine.
Maybe it's more of a Maine thing
I'd seen these in the stores but they weren't a big seller like they are here.
Try it with a biscuit, really delicious!