Coffee chain boosts rehiring efforts; Fox Biz Flash: 6/8. Dunkin' is hungry for your lunch business. The coffee chain is strolling into spring in a savory way, adding avocado toast and two varieties of grilled cheese to its seasonal menu. Dunkin' announced the new menu items Wednesday, teasing the toasty bites as a quick way to fuel up for brunch or lunch on the go. Both items are available now, with the launch of the chain's full spring menu.