What cooking oil was widely used in ancient Greece?

The most widely used cooking oil in ancient Greece was olive oil. It was a staple in their diet, used for cooking, frying, baking, and even as a form of fuel for lamps.

While other oils, like sesame and flaxseed oil, were known, they were less common and likely more expensive. Olive oil was readily available, affordable, and considered beneficial for health, making it the dominant choice in ancient Greek cuisine.