Low-sodium chicken broth is the closest match, and it works in almost anything that simmers: soups, braises, rice cooked in liquid instead of water. Bouillon dissolved by the package directions works too, provided you go easy on salt everywhere else in the recipe. Where every substitute falls apart is a pan sauce or gravy that asks the liquid to reduce into a glaze, because that trick runs on gelatin, and none of the substitutes actually have any.
Why gelatin is the part you can't fake
Chicken stock is built on a simple ratio: roughly a pound of bones to a quart of water, simmered low for three or four hours. The bones matter more than the ratio does, because backs, wings, and feet are dense with collagen, and long gentle heat hydrolyzes that collagen into gelatin. The gelatin dissolves into the water and stays there. Chill a good batch and it sets into a loose wobble, closer to a weak Jell-O than to soup.
That gelatin is doing more than a party trick in the fridge. It's what coats the back of a spoon, what makes a sauce cling to chicken instead of pooling around it, and what a cook actually means by "body" when a soup tastes thin without being able to say why. Store-bought broth, canned stock, and bouillon are made to be sold as a liquid and poured straight into a pot — nobody wants a jellied carton — so they're formulated with little to no gelatin at all. That single absence is the reason every substitute below performs almost identically to real stock in some recipes and falls apart completely in others.
What each substitute actually gives you
Four things move independently when you swap: how close the flavor lands, how much salt comes with it, whether there's any gelatin at all, and how it's measured in.
| Substitute | Swap | What you're trading |
|---|---|---|
| Store-bought broth or stock | 1:1 | Thinner than homemade and often saltier — taste before adding more salt |
| Bouillon (cube or paste) | Dissolve per package, usually about one cube per 2 cups water | No gelatin, concentrated salt — season the rest of the dish last |
| Vegetable stock | 1:1 | Keeps the savoriness, drops the chicken flavor and the gelatin |
| Water plus a splash of soy sauce or fish sauce | 1:1 | Real umami for almost nothing, still no gelatin and no chicken flavor |
| Plain water | 1:1 | Everything gets flatter and thinner — fine only where stock's job was small |
Where the swap actually fails
A recipe that says "reduce the stock by half" is asking the gelatin to concentrate into something that glazes. Do that to a substitute that never had gelatin and the liquid just gets smaller — saltier, occasionally scorched at the edges of the pan, but never syrupy. That's the real gap in a pan sauce or a gravy, and no amount of extra simmering closes it. Flour, cornstarch, or a spoonful of cold butter whisked in at the end can fake the cling, but they're compensating for something the substitute was always missing, not improving on it.
Long braises expose the same gap more slowly. A coq au vin or a French onion soup cooks its liquid down for an hour or more, and any thinness in the stock only gets more obvious as the pot reduces — you're concentrating the flaw along with everything else. Soups that stay brothy the whole time hide it best, which is exactly why "just use broth" is honest advice for chicken noodle soup and bad advice for gravy.