Costco Bakery Sweet Onion Sliders are soft, tender slider-sized rolls made with sweet onion folded into a rich, buttery dough. These small round buns are ideal for building mini sandwiches, burgers, and appetizers. The sweet onion flavor gives them a mild, savory taste that pairs well with deli meats, cheeses, pulled pork, or classic hamburger sliders. Baked fresh in-store at the Costco bakery, they offer a convenient and flavorful alternative to plain slider buns for entertaining or everyday meals.