Jamoncillo is a type of Mexican fudge made with caramelized milk. It has a light brown color and a soft, fudgy texture. The basic version incorporates milk and sugar, but the additions often include nuts and various flavorings. The preparation is simple and involves heating the milk and sugar mixture until it is thick and caramelized.
It can be made with butter, condensed or evaporated milk, while the flavorings often include vanilla and sometimes cinnamon. Jamoncillo needs to set for several hours, and before serving, it is cut into small squares. It is sometimes decorated with nuts.