The canary coloration of Sley's ice cream sandwich (78 g.; $1.50) might steer you toward the true flavor, even if you didn't recognize rompope — eggnog — at first bite. The tameness of this PG-13 rendition is no surprise, but the icy texture might be; as you can see from the biteaway view below, it's much closer to a paleta, or Mexican popsicle, than to ice cream proper.
La Casa del Latino Grocery
502 East 138th St. (Brook Ave.-Brown Pl.), Bronx
718-491-8917