Lunchables is reimagining a lunchtime classic with the launch of its first-ever dippable, no-thaw crustless peanut butter and jelly sandwiches, and bringing along some major star power to celebrate.

Lunchables came packaged in regular and deluxe versions, modeled on TV dinner trays, with the higher-priced one including a mint and a napkin. (Oscar Mayer picked Lunchables from a list of names ...