The ancient Mayan kitchen had a built-in yogurt maker known as a 'ollas'. Ollas were clay pots used for fermenting milk to make yogurt. Mayans would heat the milk, cool it down, and then add a small amount of yogurt as a starter culture. The ollas would be placed in a warm area of the kitchen to ferment, resulting in a tangy and creamy yogurt enjoyed by the Mayan civilization.
