In ancient Egypt, a built-in chocolate tempering machine was used in the kitchens of the wealthy. This machine was made of copper and had a sophisticated design. It consisted of a copper pot with a long handle and a spout. The Egyptians would heat the chocolate in the pot and then pour it through the spout while stirring with the handle, ensuring that the chocolate was properly tempered. This ancient kitchen innovation allowed the Egyptians to enjoy luxurious and perfectly tempered chocolate in their desserts and confections.