Humans have been flavoring their food for at least 6,000 years based on direct physical evidence, and likely much longer. The oldest confirmed proof of seasoning comes from pottery residues in northern Europe dating to around 6,100 years ago, but charred food fragments from cave sites in Iraq and Greece suggest people were combining specific plants with their meals as far back as 13,000 years ago. The full story stretches across tens of thousands of years, from Paleolithic cave cooking to the earliest salt production and the global spice trade.
The Oldest Direct Evidence: 6,000-Year-Old Pottery
The strongest archaeological proof of deliberate seasoning comes from prehistoric cooking pots found at three sites in Denmark and Germany. Researchers extracted microscopic plant structures called phytoliths from carbonized food residues baked onto the inside of these vessels. By comparing the shapes of those structures against over 120 European and Asian plant species, they identified them as garlic mustard seed, a peppery-tasting wild herb still found across Europe today.
The oldest of these pots, from a site called Stenø, dates to roughly 6,100 years before present, placing it before the arrival of domesticated animals or farming-style pottery in that region. Additional samples from the coastal site of Neustadt and the inland settlement of Åkonge date to about 5,900 years ago. What makes these findings significant is context: the garlic mustard seeds have almost no nutritional value. They contain very little fat or starch. The only plausible reason to add them to a pot of food is flavor. This is the clearest evidence that prehistoric people were seasoning their cooking purely for taste.
Cave Cooking Goes Back 13,000 Years
Long before pottery existed, people were preparing complex plant-based meals. Charred food fragments recovered from Franchthi Cave in Greece date to between 13,100 and 11,400 years ago, spanning the late Upper Paleolithic and Final Paleolithic periods. These aren’t just scattered seeds. They’re compressed, cooked aggregates containing identifiable remains of pulses like lentils, bitter vetch, and grass pea, mixed with starchy grasses such as oats and barley, plus nuts like almonds and pistachios.
Similar food remains have been found at Shanidar Cave in Iraqi Kurdistan, famous for its Neanderthal burials. The charred fragments there also contain pulse combinations, suggesting that mixing multiple plant ingredients together during cooking was a widespread and ancient practice. Whether these early cooks were “seasoning” in the way we’d recognize depends on your definition. They were clearly combining ingredients with different flavors and textures into prepared dishes rather than eating foods one at a time. The line between a mixed recipe and a seasoned one is blurry at that depth of time.
Salt Production Started Around 8,000 Years Ago
Salt is arguably the most fundamental seasoning in human history, and the oldest known salt production site is Poiana Slatinei in Lunca, Romania. Located next to a salt spring that’s still in use today, this site dates to between 6050 and 5500 BC, making it roughly 8,000 years old. The site belongs to the Early Neolithic period and contains dozens of combustion features, layered with ash, charcoal, and heat-reddened sediment.
The earliest technique involved pouring naturally salty brine directly onto hot combustion structures, evaporating the water and leaving salt behind. Later, during the Chalcolithic period (the Copper Age), people shifted to boiling brine in purpose-built ceramic containers. This wasn’t casual gathering. It was organized, repeated production at an industrial scale for its time. Salt’s value went beyond flavor: it preserved meat and fish, making it possible to store food for months. That dual role as seasoning and preservative likely drove its early adoption.
Why Humans Evolved to Love Spice
The question of when people started seasoning is closely tied to why they did it. One well-studied explanation is the antimicrobial hypothesis. Many common spices, including garlic, onion, oregano, and chili peppers, contain compounds that kill or inhibit bacteria and fungi that cause food to spoil. A large cross-cultural analysis found that the proportion of bacterial species inhibited by spices in a country’s traditional recipes correlates with that country’s average annual temperature. In hotter climates where food spoils faster, traditional cuisines use more spices and more potent ones.
This pattern suggests that people who enjoyed spiced food got sick less often, lived longer, and had more children, gradually shaping human taste preferences through natural selection. Over thousands of generations, the result is a species that finds the burn of chili and the bite of garlic genuinely pleasurable. The flavor preference and the health benefit reinforced each other.
How Scientists Detect Ancient Seasonings
One reason the timeline of seasoning keeps getting pushed back is that detection methods have improved dramatically. Seasonings don’t leave obvious traces the way animal bones or grain stores do. A pinch of crushed seeds dissolved into a stew thousands of years ago is invisible to the naked eye.
Phytolith analysis is one of the most powerful tools available. Phytoliths are microscopic silica structures that form inside plant cells. They’re extremely durable, surviving long after the organic plant material has decomposed. Scientists dissolve carbonized food residue from the inside of ancient pots, mount the extracted material on slides, and examine it under high-powered microscopes at 500x magnification. Each plant species produces distinctively shaped phytoliths, allowing identification down to the genus or even species level.
A second approach uses infrared spectroscopy to identify lipids and other organic compounds that soaked into pottery walls during cooking. By measuring how molecules in the residue absorb infrared light, researchers can distinguish plant fats from animal fats, identify waxes and proteins, and sometimes pinpoint specific plant families. Together, these techniques let archaeologists reconstruct recipes from pots that look like nothing more than broken, blackened fragments.
A Timeline That Keeps Expanding
The honest answer to “when did humans start seasoning food” is that we don’t have a firm starting point, only a trail of evidence that keeps getting older. The confirmed, no-doubt-about-it proof starts around 6,100 years ago with garlic mustard in Danish and German cooking pots. But the cave evidence from Franchthi and Shanidar pushes intentional flavor combinations back to at least 13,000 years ago, and salt production was well established by 8,000 years ago.
It’s also worth noting that many of the earliest seasonings would leave no archaeological trace at all. Fresh herbs, crushed leaves, flower buds, and aromatic bark decompose completely in most soil conditions. The spices we can detect are almost certainly a fraction of what people actually used. Given that even some non-human primates seek out specific bitter or aromatic plants, it’s plausible that flavoring food with wild plants is as old as cooking itself, stretching back hundreds of thousands of years. What the archaeology confirms is that by the time humans started using pottery, seasoning was already a well-established habit, not an invention.