Onion Gravy
A brown gravy built on slowly caramelized onions, sweet and deep. The classic partner of sausages, liver and onions, and smothered pork chops.
| Category | Gravies |
|---|---|
| Origin / Region | Midwest Diner Belt |
| Classic base | Sausages, liver, and smothered chops |
| Prep time | About 40 minutes, mostly onion time |
| Storage | Refrigerate sealed; the onions keep sweetening it overnight. |
| Shelf life | 4 days refrigerated; freezes well |
| Best uses | Bangers and mash, liver plates, smothered meats, shepherd's pie |
| Substitutes | Shallots for a finer version; mushroom gravy for a meatless pan |
| Last checked | October 18, 2026 |
About it
Onion gravy is British at root — the bangers-and-mash gravy — and naturalized in American diners, where caramelized onions sweeten the smothered plates. The onions must cook slowly; a rushed onion gravy is just gravy with onions in it.
Making it
Slice onions thin and cook them in fat over low heat 25 to 30 minutes until deep gold. Stir in flour, then stock, and simmer until the onions melt into the gravy. A splash of vinegar or Worcestershire sharpens it.
Serving it
Ladled over sausages and mashed potatoes, liver and onions, and any smothered plate. It is a gravy with the vegetable built in.
Swaps & pairings
Add a spoon of mustard for the British pub style. For liver and onions, make it in the liver pan so the fond joins the onions.
More from this region: Midwest Diner Belt