Mayonnaise is a thick, creamy sauce made primarily from oil, vinegar or lemon juice, and egg yolks. It can also contain other ingredients such as mustard, sugar, salt, pepper, and herbs or spices. The word "mayonnaise" comes from the French name for the city of Mahón (in Spanish: Maó), which is located on the island of Menorca in Spain. It was supposedly invented by the French chef Marie-Antoine Carême during his time working at the palace of Mahón's governor in 1815, and it quickly became popular throughout Europe. Today, mayonnaise is a widely used condiment and ingredient in many dishes around the world.