The encyclopaedia of gravy
Base gravy is the mild, smooth, onion-heavy sauce that British Indian restaurants make in bulk and turn into dozens of different curries in minutes. It is the largest-volume gravy in British cooking.
Walk into the kitchen of any British curry house and you will find a stockpot of pale golden-brown liquid on a low flame. That is base gravy — sometimes base sauce, curry base, or simply "the gravy" — and almost everything on the menu is made from it.
It is the highest-volume gravy in British cooking, and it is a gravy in exactly the sense this site means: a savoury liquid, made ahead in bulk, that carries flavour and gives body to a finished dish.
What it is¶
A very large quantity of onions, with smaller amounts of carrot, pepper and sometimes cabbage, simmered with garlic, ginger and mild spices until everything collapses, then blended completely smooth and thinned with water.
The result is deliberately underwhelming. On its own it tastes mild, faintly sweet and slightly savoury — a little like a thin onion soup that is missing something. That is the point. It is a neutral carrier, not a finished sauce, and a base gravy that tastes strongly of anything in particular will make every dish on the menu taste the same.
Three properties matter:
- Smooth. Completely, glossily smooth. Any texture at all and it is not base gravy.
- Thin. The consistency of single cream. It thickens in the pan as it reduces.
- Mild. Turmeric and a little mix powder, no chilli heat, restrained salt.
Why it exists¶
Speed. A curry house takes forty orders across twenty different dishes in an hour, and each one is expected in ten minutes. Cooking each curry from raw onions would be impossible.
The BIR system solves this by moving everything that takes time to the morning prep:
| Prepped in advance | Done to order, in 6–8 minutes |
|---|---|
| Base gravy | Frying garlic and ginger |
| Mix powder | Frying the dry spices |
| Pre-cooked meat | Adding tomato paste |
| Garlic–ginger paste | Adding base gravy in stages |
| Tomato paste, fried onions, spiced oil | Finishing with fresh herbs |
What arrives at your table was assembled in the time it took to pour a lager. See cooking a BIR curry.
How it compares to a British roast gravy¶
The two are closer relatives than they look.
| Roast pan gravy | BIR base gravy | |
|---|---|---|
| Made | To order, in the roasting tin | Days ahead, in bulk |
| Thickened by | Starch — a roux | Puréed onion |
| Flavour | Specific to the joint | Deliberately neutral |
| Purpose | Finished sauce | Carrier for other flavours |
| Quantity | A jug | A stockpot |
| Volume of onion | One, if you are lucky | Two and a half kilos |
Both are make-ahead savoury bases. One gets its body from flour, the other from vegetables blended to a purée — a thickening method older than the roux itself and closer to medieval sauces than to anything French.
A short history¶
Indian restaurants have existed in Britain since 1810, when Sake Dean Mahomed opened the Hindoostane Coffee House in London. The trade as we know it, though, is a post-war story, and largely a Bangladeshi one: the great majority of Britain's "Indian" restaurants were opened and run by families from Sylhet, in north-eastern Bangladesh.
The standardised menu — the heat ladder running korma, bhuna, madras, vindaloo — was built for British customers rather than inherited from any regional cuisine. So was the base gravy system, which appears to have developed in Britain as a practical response to volume.
The result is a genuine British cuisine of its own, and one of the most successful. In 2001 the then foreign secretary Robin Cook called chicken tikka masala "a true British national dish".
📌 Not a substitute for regional cooking
BIR is its own thing, and worth understanding on its own terms. It is not how food is cooked in Bangladeshi, Indian or Pakistani homes, and a BIR madras bears no particular relationship to the cooking of Chennai. Neither fact is a criticism of either.
The heat ladder¶
Roughly, and with enormous variation between restaurants:
| Dish | Heat | Character |
|---|---|---|
| Korma | Mild | Coconut, cream, almond |
| Bhuna | Medium | Thick, reduced, not saucy |
| Dopiaza | Medium | Extra onion |
| Rogan josh | Medium | Tomato-forward |
| Jalfrezi | Medium-hot | Green chilli, pepper and onion chunks |
| Madras | Hot | Chilli powder, tomato, lemon |
| Vindaloo | Very hot | More of the same |
| Phaal | Punishing | A dare rather than a dish |
Every one of them starts with the same ladle of base gravy.
Making it at home¶
Two recipes, depending on whether you are feeding a family or stocking a freezer:
- Base gravy recipe — the full restaurant-style batch, about 4 litres.
- Small-batch base gravy — about 1.2 litres, made in an ordinary saucepan.
You will also want BIR mix powder and pre-cooked chicken for curries before you cook anything from it.