The Mystery of a Drop of Beef Tallow

— The chili oil in your hot pot might have come from a cow that lived hundreds of years ago —

From dockworker to national delicacy, the story of a fat man's rise to fame.

What do you smell when you walk into a hot pot restaurant?

You might say: chili peppers. Or Sichuan peppercorns. Or the domineering aroma of fat bubbling in a pot of boiling red soup.

—The answer is beef tallow.

That rich, mellow aroma, which lingers in your hair for three days, doesn't come from chili peppers or Sichuan peppercorns. It comes from a piece of golden, hard, and seemingly unremarkable beef tallow.

Have you ever wondered why hot pot uses beef tallow instead of lard, beef tallow, or rapeseed oil?

Come on, today we'll dig out the "family register" of this piece of beef tallow.

01 The "Three Brothers" of the Oil World

First, let's clarify one thing: beef tallow is not the same as lard or pork fat. Although they are all animal fats, chemically they are three completely different substances.

Fun Facts: beef tallow has the highest melting point among common animal fats. Lard starts to melt at 28°C. beef tallow has a saturated fatty acid content as high as 50%-60%[3], and is as solid as a rock at room temperature and as stable as Mount Tai when boiling.

This leads to its first "superpower" in hot pot.

02 An "unexpected invention" at the dock

So here's the question: Who was the first person to throw beef tallow into a pot of chili peppers?

The answer is: most likely, he was a dockworker. Let's rewind to the late Ming and early Qing dynasties, to the Chaotianmen Wharf in Chongqing. The Yangtze and Jialing Rivers converged here, and ships came and went in great numbers.

In those days, Chongqing was a distribution center for livestock trade in the surrounding provinces. Cattle were transported to the docks for slaughter. The best meat was sold to the wealthy, while the remaining offal—tripe, throat, liver, and fat—became scraps that the butchers couldn't get rid of.

So someone bought these scraps at a low price, set up an iron pot, threw in a handful of chili peppers, a few peppercorns, a piece of beef tallow, and then sliced ​​the beef offal thinly and dipped it in—

[ A grassroots invention that changed the culinary landscape of Sichuan and Chongqing occurred amidst the bustling atmosphere of the docks. ]

Why beef tallow, and not some other type of oil? Three reasons, all of which are "essential":

• ◆ First, it's cheap.

  The slaughtering industry was thriving at the docks, and tallow, a byproduct of slaughtering, was extremely cheap.

• ◆ Secondly, it is resistant to boiling.

  beef tallow has a high melting point and good thermal stability, so it is not easy to oxidize and deteriorate even after long-term cooking.

• ◆ Thirdly, it retains its odor.

  beef tallow can cling firmly to food—exploding the moment it enters your mouth.

From its humble beginnings on the docks to its rise to prominence, this journey has taken nearly two centuries.

Legend has it that around the Daoguang era of the Qing Dynasty , tripe hotpot began to appear at banquets in Chongqing. By the 1920s , vendors in the Jiangbei area were already carrying loads of beef offal, washing and cooking it, cutting it into small pieces, and placing it on a clay stove with a divided iron basin on top, filled with a numbing, spicy, and salty broth. The laborers working by the bridge and river would gather around the load, each choosing a section to eat as they cooked—paying for the number of pieces they ate.

Short HistoryThis "divided serving" model is not only economical but also helps to ward off the cold and dampness—the day's hard work of the dockworkers melts away in this pot of boiling broth.

It wasn't until 1934 that a small restaurant in Chongqing moved the hot pot from street vendors to restaurants—the clay stove remained, but the divided iron basin was replaced with a small copper pot, and diners were allowed to prepare their own broth and dipping sauce. Subsequently, the Lu couple opened "Sanwu Hot Pot Restaurant," and other famous establishments such as Yunlongyuan, Shuyuan, Yisiyi, Buzuiwugui, and Qiaotou followed suit. During the War of Resistance against Japan , hot pot restaurants flourished throughout Chongqing, completely transforming the restaurant from a staple for dockworkers to a national delicacy.

03 From cast iron pots to factories: The "technological evolution" of beef tallow.

The hot pot at the dock uses the most primitive method: chop up beef fat and throw it into the pot to dry-roast – this is called "fire-roasting beef tallow" .

In modern times, the production of beef tallow has undergone a complete technological upgrade.

standardAccording to the national standard GB/T 46004-2025 "Animal Fats and beef tallow" released in 2025 , a qualified piece of hot pot beef tallow must undergo strict process control.

Raw fat → Crushing → Melting → Oil residue separation → Refining (degumming → deacidification → decolorization → deodorization) → Cooling → Filling → Inspection and shipment

From "checking the craftsman's touch today" to "every batch has a test report," it took beef tallow almost a hundred years to complete this journey.

The dockworkers back then probably never imagined that the piece of fat they casually tossed into the pot would have its own national standard a hundred years later.

04 The "scientific identity card" of beef tallow

Enough with the emotional stuff, let's get to the main event. Why is beef tallow the soul of hot pot? — This isn't some mystical explanation, it's chemistry.

First, melting point magic

beef tallow has a melting point between 40-50°C. It melts completely in a boiling pot, evenly coating the spices; after the ingredients are removed from the pot and cooled slightly, the beef tallow solidifies on the surface – locking in the flavor. This is the underlying logic of the "seven parts oil, three parts broth" golden ratio.

Second, fat-soluble "deliverymen"

Capsaicin and sanshool are both fat-soluble substances. High-temperature oil breaks down cell walls, dissolving the flavor compounds, which then adhere to the surface of the food.

So why use beef tallow? Not because it's the "only one that can dissolve," but because it performs better "after dissolving." beef tallow contains 55%-65% saturated fat, which forms a semi-solid network upon cooling, physically locking in flavor molecules. beef tallow's irreplaceability lies not in the chemical aspect of "it's the only one that can do it," but in the physical aspect of "it's better."

Third, a symphony of over a hundred flavor compounds.

In 2024, a study published in *China Oils and Fats* analyzed the flavor compounds in refined beef tallow, detecting a total of 23 flavor compounds . The seven compounds that contributed the most to the flavor profile were:

In the same year, another study published in the journal Food and Fermentation Industries detected 154-158 volatile flavor compounds in eight commercially available beef tallow hot pot base samples.

Fun FactsThe reason you can't resist stopping in front of a hot pot restaurant is because of these substances. Their concentration is minuscule (on the order of one part per million), but human sense of smell is extremely sensitive to them.

05 A modern journey through a block of beef tallow.

So here's the question: Is the beef tallow you eat in hot pot today the same as the beef tallow on the dock a hundred years ago?

Yes and no. The core hasn't changed—it's still pure fat obtained by rendering beef fat. But quality control has undergone a fundamental change.

Previously, it relied on the experience and feel of master craftsmen; now it relies on data and standards—what exactly does this standardized system look like?

In 2025, the state issued the first national standard GB/T 46004-2025 Animal Oil beef tallow [3], and in the same year, Chongqing also issued DB50/T 1840-2025 Technical Specification for Hot Pot beef tallow Production [2] - from raw materials to factory exit, each link has clear "rules of the game".

From docks to factories, from experience to standards—this is the "modern rebirth" of beef tallow.

End

A single drop of beef tallow, from cheap grease on the docks to a precise map of over 150 flavor compounds in the laboratory—this "grassroots comeback" has taken hundreds of years.

It carries the sweat of dockworkers, the spicy genes of Sichuan and Chongqing cuisine, the standardization process of China's food industry—and a pot bubbling with the warmth of everyday life.

The next time you sit in front of a hot pot, watching the red broth bubbling away— you'll be eating more than just a piece of beef tallow .