Ancient Cacao DNA Shows Indigenous People in Georgia Drank Chocolate 900 Years Ago

Long before Europeans set foot in North America, people in what is now northern Georgia may have been sipping chocolate. A new archaeological study says broken pottery from the Etowah site, one of the most important cities of the Mississippian civilization that flourished in the eastern United States, contains genetic traces of the cacao tree, the plant that gives us chocolate. That’s the raw material behind every candy bar and hot cocoa mix on shelves today, and finding its DNA in 900-year-old pottery from Georgia is a big deal.

Scientists who studied the pottery fragments found genetic material from cacao, the plant whose beans are used to make chocolate. Reporting in the journal PLOS One, the researchers call it the first solid genetic proof that people living east of the Mississippi River had access to chocolate, putting the Mississippian world in the same category as the Ancestral Pueblo people of Chaco Canyon, New Mexico, who were already known to have consumed chocolate drinks around the same era.

More surprising than the location is what the chocolate was doing there. A tropical plant adapted to climates far warmer than Georgia ended up in vessels used during what appears to have been a ceremony tied to building one of Etowah’s earthen mounds. That raises real questions about how far trade networks stretched across ancient North America, and how connected Indigenous societies were long before Columbus arrived.

A Clue That Wasn’t Enough on Its Own

Archaeologists had reason to suspect something interesting was happening in Etowah’s pottery well before this study. Back in 2017, a research team tested 31 pottery fragments dug up decades earlier from large pits at the site. Those pits had originally been carved out to gather earth for Etowah’s first platform mound, then filled back in with leftovers from feasts, including broken pottery and animal bones.

Using lab tests designed to detect chemical residue trapped in old pottery, researchers looked for four chemical markers linked to cacao, including caffeine. Twenty-one of the 31 fragments tested positive for at least two of the four markers, and three contained all four. That looked like strong evidence of chocolate drinking.

There was a catch, though. Those same four chemicals also turn up in yaupon holly, a caffeinated plant native to the Gulf and Atlantic coasts that Indigenous groups brewed into a ceremonial drink historically called Black Drink. Since yaupon holly grew locally and cacao didn’t, researchers at the time figured people were more likely drinking Black Drink. Chemistry alone couldn’t settle the argument.

How Ancient DNA Settled the Chocolate Question

That unresolved question is what pushed scientists to try a new approach. They went back to the three pottery samples that had tested positive for all four chemical markers and searched directly for genetic material from the cacao plant itself. DNA is far more specific than chemical residue, so it sidesteps the mix-up entirely.

Ancient DNA breaks down into tiny, fragile pieces over the centuries, so the team worked in a specialized lab in Paris built to prevent contamination from modern DNA, complete with filtered air and full protective gear for the researchers. After sequencing hundreds of millions of genetic fragments pulled from the pottery residue, the team filtered out everything that didn’t match the cacao genetic code, and ultimately confirmed real cacao DNA in two of the three samples.

Several clues confirmed the DNA was genuinely ancient rather than modern chocolate accidentally contaminating the sherds. The recovered genetic fragments were unusually short, averaging only about 84 letters long, a telltale sign of centuries of decay. Longer DNA sequences also failed to copy properly in lab tests, the opposite of what happens with fresh, modern cacao DNA. Researchers also ran a preliminary comparison of the ancient snippets against samples representing cacao’s major family lines, finding ties to genetic groups that have also been identified in ancient Maya sites in Belize and in archaeological contexts in Ecuador. They caution that the sample size is too small to say with certainty exactly where Etowah’s cacao came from.

Chocolate Tied to Sacred Ground

Location matters a great deal here. Etowah, in what’s now Bartow County, reached its height in the 14th century. But the pottery containing cacao DNA came from a much earlier period, the 11th and 12th centuries, when residents were digging pits to gather earth for the site’s first platform mound. Once the dirt was removed, people filled the pits back in with the remains of large communal feasts.

Archaeologists studying Mississippian culture have argued that mound building itself functioned as a ritual meant to renew the world and strengthen bonds between different social groups. Archaeologist Vernon James Knight described the practice as a communal rite of intensification designed to renew the world. If cacao was part of the feasting that went along with building the mound at Etowah, chocolate may have been more than a treat. It may have been woven into some of the community’s most important shared rituals.

No actual cacao beans, pods, or plant remains have ever turned up at Etowah. All evidence comes from residue trapped inside the walls of broken cooking and serving pots. That makes sense, since cacao trees can’t survive Georgia’s climate. Whatever was in those pots had to reach Etowah from far outside the region.

Reopening Old Questions About Ancient Trade

Exactly where that cacao came from is still a mystery. At Chaco Canyon, researchers have found copper bells, decorative inlaid objects, and scarlet macaws linking the site to trade with tropical Central America. No similar physical evidence ties Etowah directly to Central America. Some researchers now wonder whether cacao moved through networks connecting the Southwest to a region known as Caddoan Mississippian, covering parts of modern Arkansas, Louisiana, Oklahoma, and Texas, where turquoise, southwestern-style pottery, and volcanic glass have all turned up in later centuries.

For much of the 20th century, archaeologists avoided crediting Mississippian achievements to outside contact, in part to push back against dismissive theories claiming Indigenous peoples of the Eastern Woodlands couldn’t have built complex societies without foreign help. This new evidence doesn’t reverse that history. Instead, it opens the door to honest questions about long-distance trade and cultural exchange, without taking anything away from what Mississippian people built on their own. The researchers behind the study also suggest that similar chemical evidence found at other Mississippian sites, including Cahokia and locations along the Ohio and Mississippi river valleys, previously chalked up to yaupon holly, might deserve a second look with DNA testing.

Chocolate’s history in North America just got more complicated, and more interesting. A drink previously documented in Mesoamerica and the Southwest apparently reached deep into Georgia’s woodlands, though archaeologists still don’t know exactly how it got there. That detail, tucked inside a broken piece of pottery from a thousand-year-old mound, is reason enough to keep digging.