In ancient Native American cultures, a built-in chocolate tempering machine was used in the kitchens of certain tribes. This machine was made of clay and had a simple yet effective design. It consisted of a clay pot with a wooden handle and a spout. The Native Americans would heat the chocolate in the pot and then pour it through the spout while stirring with the handle, achieving the desired temper. This ancient kitchen innovation allowed the Native Americans to enjoy flavorful and perfectly tempered chocolate in their traditional recipes and delicacies.