Charred Crust on Ancient Pots Reveals That Stone Age Europeans Cooked Elaborate Plant-Based Meals

The food crusts burned onto the inside of ancient pots are, to the trained eye, a recipe preserved in carbon. For decades, archaeologists have read those crusts primarily through lipid analysis - extracting fatty acids from the ceramic matrix to identify which animals were cooked. Fish oils, ruminant fats, dairy: the method has told us a great deal about what Neolithic and Mesolithic Europeans were eating. But it has also, systematically, told us almost nothing about plants.

Fat does not preserve well from most plant foods. Roots, leaves, berries, grasses - the parts of the diet that do not render out grease - pass through lipid analysis without leaving a legible signature. If you only run lipid analysis, you end up with a picture of ancient diet that is heavily weighted toward animal products, simply because those are the things the method can see.

Looking at the food crusts differently

A team led by Lara Gonzalez Carretero of the University of York combined lipid analysis with microscopic examination and chemical analysis of the physical plant tissue preserved in burned food crusts - charred remains that survive in pottery in ways that open-air deposits do not. The study, published March 4, 2026 in the open-access journal PLOS One, examined organic remains from 58 pieces of pottery across 13 archaeological sites in Northern and Eastern Europe, spanning from the 6th to the 3rd millennium BC.

The combined approach recovered tissue samples from a wide variety of plants: grasses, berries, leaves, and seeds. In many cases, plant remains were found alongside those of animals - most often fish and other seafood. The mixtures were specific to their regions, reflecting what was locally available and, presumably, what local culture had decided to cook together.

Hunter-gatherer-fishers with complex kitchens

The findings directly challenge the simplified view of early European diets as primarily animal-based. These communities were not simply roasting fish over fires. They were processing and combining multiple food sources in ceramic vessels - a form of cooking that requires deliberate preparation, controlled heat, and, the researchers argue, established culinary traditions.

The geographic variation in what was found where is also meaningful. Each region showed its own characteristic combination of ingredients, suggesting that distinct culinary cultures had developed across Northern and Eastern Europe by the Neolithic. Communities in different areas were not just eating what happened to be around - they were making consistent choices about what to combine and how to prepare it.

"While conventional chemical analysis tends to highlight the animal-based components of ancient meals, our combined microscopic approach has brought these prehistoric recipes back into focus," the authors write. "We found that hunter-gatherer-fishers were not living on fish alone; they were actively processing and consuming a wide variety of plants."

What this means for how we reconstruct the past

The methodological lesson here may be as important as the dietary findings. Lipid analysis has been the dominant tool for studying ancient food residues in pottery, and it has produced genuinely valuable results. But this study suggests that for plant-dominated aspects of ancient diet, it is essentially blind. Any reconstruction of prehistoric European diets that relies solely on lipid data is likely to underestimate - possibly dramatically - the role of plant foods.

The combination of microscopy and chemistry that the York team used is more labor-intensive than running lipid analysis alone. Not every archaeological project will have the resources or the collaboration network to apply both. But the study makes a strong case that results from lipid-only analyses of food crusts should be interpreted with more caution than they typically receive.

The sites analyzed span the Neolithic and Mesolithic periods across a broad geographic range, from Scandinavia to Eastern Europe. The pottery itself indicates that these communities were investing in ceramic technology for food preparation - a technology that takes time, skill, and materials to produce. Finding that the food they put in those pots was as sophisticated as the vessels suggests that the conventional picture of early European subsistence has been, in important ways, too simple.