The file
Frosting as a dip, with cookies as the delivery system. Dunkaroos were the most-traded item in any '90s cafeteria, and the kid who had the vanilla-with-sprinkles tub had leverage.
They left U.S. shelves in 2012 but never left Canada, which created a small smuggling culture: Americans posting on forums looking for a Canadian to mail them a box. General Mills noticed and brought them back in 2020, sprinkles and all.
A rare full comeback. They're in the cookie aisle right now.
Sources: Wikipedia — Dunkaroos