Maltose, also known as malt sugar, is a sticky sweet syrup made from malt. Maltose is the secret ingredient used in Chinese BBQ or roasted meats, such as char siu (page 00) and Peking duck. I recommend MapleWood Maltose, a product of China. Maltose keeps well in the refrigerator, but once chilled, it becomes extremely gummy and almost rock solid. Leave it out at room temperature for a few hours before attempting to extract it from the container.