Stocks & broths
master stock
卤水 (lǔshuǐ) · A deeply seasoned, repeatedly reused aromatic braising liquid used to poach, braise or finish proteins and vegetables in the Chinese culinary tradition. Unlike Western stocks, master stock is built over time, seasoned with soy sauce and rock sugar, and replenished after each use — it improves with age and carries generational significance in restaurant and family kitchens alike. It functions simultaneously as a cooking medium and flavoring system.
The formula
1 L water : 50–60 g sugar : 90–120 mL soy sauce (light + dark) : aromatics
Scale liquid volume by total weight of protein — enough to submerge completely. A 4–5 kg protein batch typically requires 3–4 L stock. Classic aromatics per liter: 15 g star anise, 3 whole cloves, 5 g cassia bark, 3–5 g white peppercorns, 2 dried chiles, 3 slices ginger, 2 spring onion whites. Use 60–70% light soy, 30–40% dark soy. Rock sugar (bīng táng) preferred for clean sweetness; replace up to half with dark brown sugar. Replenish seasonings after every 3–4 uses.
Identity
- Always contains soy sauce — light for salinity and umami, dark for color and caramel depth
- Always contains sugar — rock sugar for neutrality, dark brown sugar for maltiness
- Always contains star anise as the dominant spice element
- Never boils during braising — bare simmer (85–92 °C) only
- Reused and replenished across multiple services, not discarded after one use
Ingredients
| Liquid | water | Filtered or softened water; chlorine imparts harsh notes that persist during reuse. |
| Sweetener | rock sugar (bīng táng) | Dissolves slowly, adds clean sweetness without acidity. Dark brown sugar may substitute for up to 50%. |
| Seasoning | light (salty) soy sauce | Primary seasoning; provides glutamate-driven umami and salt. Use 60–70% of total soy volume. |
| Seasoning | dark (sweet) soy sauce | Adds mahogany color, mild sweetness and caramelized soy depth. Use 30–40% of total soy volume. |
| Aromatics | star anise (whole) | Non-negotiable; 2–3 per liter. Contains anethole — the dominant aromatic signature. |
| Aromatics | cassia bark (or cinnamon stick) | Cassia (Cinnamomum cassia) preferred over Ceylon for bolder coumarin and cinnamaldehyde. |
| Aromatics | white peppercorns | Adds clean heat without color. Use 3–5 g per liter. |
| Aromatics | ginger (fresh, sliced), spring onion whites | Remove before storing. Provide fresh, bright aromatics to counterbalance sweetness and spice. |
Method
- 1Combine water and rock sugar in a pot over medium heat; stir until sugar dissolves (2–3 minutes).Dissolving sugar first ensures even distribution and prevents scorching; the syrup phase begins building the stock's characteristic glossy finish on proteins.
- 2Add light and dark soy sauces; bring to a gentle simmer (85–92 °C).A bare simmer extracts spice aromatics without driving off volatile compounds or cooking off seasoning prematurely.
- 3Add aromatics (star anise, cassia, peppercorns, chiles if using) in cheesecloth or directly; add ginger and spring onion whites. Simmer uncovered 20 minutes to infuse.Twenty minutes extracts essential oils (anethole, cinnamaldehyde) without over-extracting bitter tannins.
- 4Submerge proteins completely in the hot stock; maintain 85–92 °C throughout braising.Gentle poaching cooks through proteins while preserving their glaze. Boiling emulsifies fat unevenly and causes proteins to shed moisture.
- 5Braise to doneness (30 minutes for thin-sliced pork belly; 2–3 hours for whole chicken or pork hock). Remove proteins, strain and cool the stock; store aromatics separately or strain them out entirely.Straining prevents over-infusion of bitter compounds during storage and keeps the liquid clean for reuse.
- 6Replenish after each use: add 30–40% of original seasoning amounts (soy sauces, sugar, fresh aromatics); simmer 10 minutes before next braise.Each use depletes salt, sugar and aromatics. Replenishing maintains consistency; complexity deepens as Maillard products and gelatin accumulate.
Techniques that matter
Bare-simmer poaching (85–92 °C)
Precise temperature control prevents protein shrinkage, moisture loss and toughening while preserving the stock's glaze on surfaces.
Proportional replenishment
After each use, approximately 30–40% of seasoning is absorbed or evaporated. Adding back a proportional amount maintains flavor consistency.
Layered sweetener strategy
Combining rock sugar with dark brown sugar and dark soy sauce creates a complex sweetener base that browns proteins evenly and produces the signature lacquered appearance.
Aromatic bundling (cheesecloth)
Prevents fine spice particles from dispersing excessively and allows aromatics to be removed cleanly before storage.
Fat skimming
Accumulated animal fat can turn rancid during refrigeration and cause off-flavors in subsequent uses. Skimming before storage extends usable life.
Variations & derivatives
hong shao lǔ (red-cooking stock)Shandong / Jiangsu, China
Intensified version with higher dark soy sauce ratio and added Shaoxing wine; produces deeper mahogany color. Regional standard for pork knuckles and chicken.
nanxiang lǔ (southern aromatic stock)Fujian / Guangdong, China
Uses five-spice powder with dried seafood (dried scallops, flounder) for umami-rich base. Used for tofu skin rolls and offal.
Vietnamese nước hàng (caramel sauce base)Vietnam
Sugar-charred caramel combined with fish sauce and water; functionally a master stock variant for bún bò Huế. Fish sauce provides primary seasoning.
Korean dohujajiangKorea
Soy-based braising liquid with Asian pear (sweetness and enzymatic tenderizing), onion, garlic and ginger. Used for jjajangmyeon braise.
Used in these dishes
Substitutions
- rock sugar → dark brown sugar — Approximates rock sugar's sweetness but introduces more molasses notes. Use 60–70% amount by weight.
- dark soy sauce → 1:1 mix of light soy + molasses (5 mL per 100 mL soy) — Molasses approximates dark soy's color and caramel depth but adds slight bitterness.changes result
- light soy sauce → tamari — Tamari has comparable salinity and umami but slightly less wheat-based fermented complexity; functional in most applications.
- star anise → 1 star anise + ¼ tsp anise seed — Anise seed provides some licorice note but lacks star anise's complex anethole profile.changes result
Troubleshooting
Stock tastes flat after reuse
Seasoning depleted without replenishment; sugar acidified by over-cooking; aromatics not refreshed → Bring stock to simmer, add 30% of original soy and sugar amounts, 2 star anise, fresh ginger and spring onion; simmer 10 minutes and taste before next use.
Braised proteins come out tough or dry
Braising temperature too high (rolling boil drives moisture out); overcooking; insufficient submersion → Maintain 85–92 °C only; ensure complete submersion; use a thermometer and add cold water if temperature climbs during long braises.
Stock turns rancid or sour within days
Animal fat not skimmed after braising; protein particles suspended; container not airtight → Skim all surface fat immediately; strain through fine mesh; store in airtight glass; use within 10 days refrigerated or freeze in portions.