Remouillage Double Stock (Extraction Guide)

Remouillage is a second, gentler extraction from bones and aromatics already used to make stock. Strain it, chill it safely, then use the unsalted liquid in place of water for another stock. It is usually lighter than first stock, not automatically double-strength. A steady simmer, careful straining, and prompt cooling protect its flavor and clarity.

Making another stock from the same bones is a practical way to draw out more flavor before discarding them. The key is to treat the second extraction as its own stock-making step, not as a shortcut that guarantees a richer result. The bones have already given up some flavor and gelatin, so remouillage often tastes milder than the first stock.

When I teach this method, I ask cooks to focus on three things: keep the bones covered, hold a gentle simmer, and leave salt out until the final dish is seasoned. These habits make the extraction easier to manage and give you more control when the liquid becomes the base for another stock.

What remouillage is and how to use it

Remouillage is a second stock made by simmering bones that have already been used for a first stock. The French term is often translated as “rewetting.” The resulting liquid can replace water in a fresh stock, but its strength depends on the bones, water amount, and extraction.

Think of it as an additional extraction, not a way to make the first stock stronger after the fact. The bones and aromatics have already contributed to the first batch. They can still yield flavor, but the second liquid is generally less concentrated and may have less body.

Use the strained, unsalted remouillage as the water phase for a later stock. For example, you can pour it over a fresh batch of bones and aromatics, then follow your usual stock method. You can also use it as a savory cooking liquid. Taste the finished preparation before adding salt, especially if you plan to reduce it.

Choose a suitable pot and prepare the bones

A stainless-steel stockpot is a dependable choice for a long, mildly acidic simmer. It is non-reactive and does not need seasoning. For induction, check that the pot has a magnetic base by testing it with a magnet; cookware can vary, so follow the maker’s instructions as well.

Avoid unlined copper and bare aluminum for prolonged extraction, since acidic ingredients can react with these metals. An enameled cast-iron pot is suitable if the enamel is intact, though its heavy body heats and cools slowly. Keep the pot on the burner; this method does not require oven use.

Before you begin, remove spent vegetables and loose debris from the bones. Put the bones in the pot and add fresh, cold, potable water until they are covered by about 2.5–5 cm (1–2 inches). Do not salt the liquid if you will use it in another stock or reduce it later.

Check that the pot and its handles are suitable for your stovetop. If you use a lid, follow its care and heat instructions. There is no single cookware temperature limit or thermal-shock rule that applies to every brand. Do not pour cold water into a hot pot or set a hot pot on a cold, wet surface.

Make remouillage step by step

A controlled extraction starts with a gradual rise to a bare simmer, then holds that heat for several hours. For typical beef or veal bones, plan on 4–6 hours. Smaller or more fragile poultry bones usually call for the shorter end of the range.

1. Load and heat. Put the cleaned, spent bones in the pot and cover them with cold water. Heat gradually. As the water warms, skim foam and surface impurities with a spoon or skimmer.

2. Set the simmer. Aim for 85–95°C (185–203°F). The liquid should show small, gentle bubbles rather than a hard, rolling boil. A thermometer can help you learn how your stove and pot behave, but keep watching the surface too.

3. Extract. Hold the gentle simmer for the chosen time. Avoid vigorous stirring, which can disturb the solids and cloud the liquid. Add small amounts of hot water only if needed to keep the bones covered; adding large amounts can dilute the extraction.

4. Strain. Turn off the heat and strain the liquid through a fine sieve. Do not press or squeeze the bones and debris through the strainer. Pressing can push fine particles into the stock and make it harder to keep clear.

A hard boil can emulsify rendered fat and proteins into the liquid. The result may look cloudy and feel greasy. If the pot begins to boil vigorously, lower the heat and let the surface settle before continuing.

Use the liquid in a later stock

Remouillage is most useful as a savory substitute for water in another stock. Add it to fresh bones and aromatics, then cook the new stock as usual. Since the remouillage may already have a mild flavor, taste the finished stock before deciding whether it needs more reduction or seasoning.

Here are two common kitchen situations:

• You want a fresh batch of stock. Strain and cool the remouillage, then use it instead of water with fresh bones. Avoid assuming it will produce a “double-strength” stock; the result depends on the new ingredients and how much liquid you use.
• You need a cooking liquid. Use it in a preparation where a savory, unsalted liquid fits. Taste as the dish cooks, and add salt near the end so you can judge the final concentration.

For serving clear stock, reheat it safely, skim excess fat if needed, and pour it into prewarmed bowls or cups. A light garnish can add contrast, but keep it simple so it does not cover the stock’s aroma or clarity.

Cool, store, and reheat safely

Stock needs prompt, controlled cooling because a large, deep pot can hold heat for a long time. Divide the strained liquid among shallow containers or use an ice bath to speed cooling. Do not cool it by pouring cold water into the hot pot; sudden temperature changes can stress cookware, especially thinner pots.

For cooling under the U.S. FDA Food Code, cool from 57°C to 21°C (135°F to 70°F) within two hours, then from 21°C to 5°C (70°F to 41°F) or below within a further four hours. Use a thermometer to check the liquid, rather than relying only on whether the container feels cool.

Refrigerate remouillage at 5°C (41°F) or below, or freeze it for longer storage. Label each container with its contents and date so you can identify it later. Once chilled, you can remove the solidified fat if you want a leaner liquid. Stainless steel needs no oil or seasoning; wash it with detergent and a non-scratch sponge after it has cooled.

For commercial hot holding, the FDA Food Code specifies reheating cooled food to 74°C (165°F) for 15 seconds within two hours before placing it in hot holding. Home cooks should follow applicable local food-safety guidance. Reheat only the amount you need, and avoid repeated cooling and reheating when practical.

Common problems and practical fixes

Most problems come from excess heat, poor cooling, or unclear labeling. Small adjustments help: lower the burner when the surface becomes active, strain without pressing, and divide the liquid before cooling. If the finished liquid is cloudy, it may still be usable in a dish where clarity is not important.

• The stock is cloudy or greasy: The liquid may have boiled hard or the solids may have been pressed. Next time, maintain a gentler simmer and let the sieve do the work.
• The bones are exposed above the liquid: Add a small amount of hot water to restore coverage. Avoid frequent or large additions, which can dilute the extraction.
• The liquid tastes weak: That can be normal for a second extraction. Use it as the liquid for a new stock, or use it in a dish that benefits from a mild savory base.
• The pot has stuck residue: After it cools, soak it or simmer water in the pot to loosen residue. Do not quench a hot pot with cold water.
• You are using enamel: Keep the coating intact by avoiding metal tools and abrasive scouring. Dry the pot well before storing it.

Frequently asked questions

These answers cover the main choices cooks face when making and using a second extraction. They clarify how long to simmer, whether to add salt, and what to expect from the finished liquid. Use the temperature and cooling targets above, and follow your cookware maker’s care instructions.

Is remouillage the same as double stock?
No. It is a second extraction from bones already used for stock. It is usually less concentrated than first stock and is not automatically double-strength.

How long should I simmer it?
For typical beef or veal bones, simmer for 4–6 hours. Use the shorter end for smaller or more fragile poultry bones.

Should I add fresh vegetables?
The essential step is to remove spent vegetables and loose debris from the first stock. If you add fresh aromatics, treat them as ingredients in a new extraction and account for their flavor in the next stock.

Do I need to salt the liquid?
No. Keep it unsalted if you will use it in another stock or reduce it. Season the finished dish after tasting.

Can the liquid boil?
Avoid a rolling boil. Keep it at a gentle simmer of 85–95°C (185–203°F) to reduce the risk of emulsifying fat and proteins into the stock.

Do I need to stir the bones?
No. Avoid aggressive stirring. Keep the bones covered and let the simmer do the work.

Can I use an aluminum pot?
Avoid bare aluminum and unlined copper for prolonged stock extraction because acidic ingredients can react with them. Stainless steel is a suitable non-reactive option.

How should I cool it?
Strain the liquid into shallow containers or use an ice bath. Follow the FDA Food Code cooling limits: 57°C to 21°C within two hours, then to 5°C or below within four more hours.

Can I freeze remouillage?
Yes. Refrigerate it at 5°C (41°F) or below, or freeze it for longer storage. Label the container with its contents and date.

What should I do with the spent bones afterward?
They have already been used for two extractions. Discard them and any spent aromatics after straining; do not treat them as fresh stock ingredients.

Remouillage is a useful way to make another savory liquid from bones that still have something to give. Keep the extraction gentle, strain without pressing, and cool the liquid promptly. Most important, taste it for what it is: a second stock that can support a new batch or a cooked dish, not a guaranteed double-strength concentrate.

(This article was written by one of our staff writers, Daniel M. Whitaker. Visit our Meet the Team page.)