| Primary ingredient — Stock | Bones and cartilage-rich cuts |
| Primary ingredient — Broth | Meat (with or without bones) |
| Typical simmer time — Stock | 3–6 hours (chicken); 6–12 hours (beef) |
| Typical simmer time — Bone Broth | 12–24+ hours |
| Gels when refrigerated | Stock: yes; Broth: rarely; Bone Broth: firmly |
| Typical salt level | Stock: low/none; Broth: seasoned; Bone Broth: varies |
Why the Distinction Matters
Walk down any grocery aisle and you'll find cartons labeled stock, broth, and bone broth sitting side by side, often with similar colors and nearly identical prices. Many recipes use the terms interchangeably, and home cooks have done the same for generations. But these three liquids are genuinely different in how they're made and how they behave in the kitchen — and knowing the difference helps you choose the right one for the job.
This reference guide breaks down each term clearly so you can read a recipe label or a store carton with confidence. For a deeper look at technique, see what actually sets these liquids apart in our home cooking tips section.
| Primary ingredient — Stock | Bones and cartilage-rich cuts |
| Primary ingredient — Broth | Meat (with or without bones) |
| Typical simmer time — Stock | 3–6 hours (chicken); 6–12 hours (beef) |
| Typical simmer time — Bone Broth | 12–24+ hours |
| Gels when refrigerated | Stock: yes; Broth: rarely; Bone Broth: firmly |
| Typical salt level | Stock: low/none; Broth: seasoned; Bone Broth: varies |
Stock, Broth, and Bone Broth: Definitions at a Glance
Here's what each term technically means — both in traditional cooking and as it appears on modern store labels.
Stock
A cooking liquid made by simmering bones (and sometimes cartilage-rich cuts) with aromatics. Long cooking extracts gelatin, giving stock a rich body and silky texture. Traditionally low in salt.
Broth
A cooking liquid made by simmering meat and vegetables with seasonings. Lighter in body than stock because less collagen is extracted. Usually seasoned enough to drink on its own.
Bone Broth
A long-simmered stock made from bones, cooked for 12–24 hours or more to maximize gelatin and mineral extraction. Results in a very full-bodied, deeply flavored liquid that gels firmly when chilled.
Gelatin
A protein released when collagen-rich bones and connective tissue are simmered for an extended time. Gelatin gives stock and bone broth their characteristic silky body and causes them to solidify when refrigerated.
Aromatics
Vegetables and herbs — typically onion, carrot, celery, bay leaves, and peppercorns — added to stocks and broths to build background flavor during simmering.
Collagen
A structural protein found in animal bones, cartilage, and connective tissue. When cooked slowly in liquid, collagen converts to gelatin, which thickens and enriches the cooking liquid.
Stock
Stock is made primarily from bones (and often cartilage-rich parts like chicken backs or beef knuckles), typically with some aromatics such as onion, celery, and carrot. The key feature of stock is its body — long simmering extracts gelatin from the collagen in bones, giving stock a slightly thick, silky texture when it cools. A well-made chicken stock will gel in the refrigerator. Stock is traditionally unseasoned or only lightly salted, making it a flexible building block for sauces, gravies, soups, and braises.
Broth
Broth is made by simmering meat (sometimes with bones, but the emphasis is on the flesh) along with vegetables and seasonings. It is typically lighter in body than stock because it extracts less collagen. Broth is usually seasoned and is flavorful enough to drink on its own. Because of its thinner consistency, it's often the better choice when you want a light soup or a cooking liquid that won't thicken a dish.
Bone Broth
Bone broth is essentially a long-cooked stock — the same concept of simmering bones, but for a significantly extended period (often 12 to 24 hours or more). This prolonged cooking extracts more gelatin and minerals from the bones. The result is a deeply flavored, full-bodied liquid that gels firmly when chilled. The term gained mainstream popularity through wellness communities, though it is worth noting that the specific health claims sometimes made about bone broth are not uniformly supported by clinical evidence. As a cooking ingredient, it functions much like a rich stock.
Swapping Them in Recipes
Most recipes will work reasonably well if you substitute stock for broth or vice versa, but there are trade-offs worth understanding.
- Using broth where stock is called for: The dish will be thinner and may taste saltier if the broth is pre-seasoned. Adjust added salt accordingly.
- Using stock where broth is called for: Dishes like simple soups may feel richer or heavier than intended. This is often a welcome upgrade.
- Using bone broth: Because it gels strongly, bone broth adds body to dishes the same way stock does — sometimes more so. It's a direct substitute for stock in most applications.
- Low-sodium labels: Cartons marked "low sodium" or "unsalted" give you the most control over final seasoning, regardless of which type you choose.
If you'd like to make your own instead of buying it, making stock from kitchen scraps is a practical and budget-friendly place to start.
Store-Label Terms Aren't Always Precise
Food manufacturers are not held to a strict legal definition that separates "stock" from "broth" on packaging in the US. This means a carton labeled "chicken broth" may actually contain more bone-based gelatin than one labeled "stock," or vice versa. The most reliable approach is to read the ingredient list and the sodium content rather than relying on the label term alone. If body and richness matter to your recipe, look for products that list bones prominently in the ingredients.