Onion gravy is a type of gravy prepared with onion. Various types of onions are used in its preparation. Some preparations caramelise the onions. Onion gravy may be served to accompany many foods, such as pork, beef steak, meatloaf, hamburger, bangers and mash, hot dogs, and chips, among others. Vegan onion gravy also exists, which may use seitan cooking broth in its preparation. Premade mixes and formulations also exist, such as solid sauce bars.