Dilly beans are green beans pickled in a vinegar or fermented brine with dill and usually garlic, producing a crunchy, tangy, herbaceous pickle. They're a home-canning staple in the United States, especially the Midwest and Northeast, traditionally made in late summer with a garden's surplus green bean harvest.
Dilly beans are typically served as a condiment or snack alongside sandwiches and burgers, as a Southern accompaniment to fried chicken, and as a briny garnish in Bloody Marys and other cocktails. Their crunch and acidity make them a good match for rich meats, cured meats and cheeses on a snack board, and creamy dairy- or sauce-based dishes.