Wikipedia Article About Barley malt syrup on Wikipedia Barley malt syrup is a sweetener produced from sprouted barley, containing approximately 65 percent maltose, 30 percent complex carbohydrate, 3% protein. Malt syrup is dark brown, thick and sticky; and possesses a strong distinctive flavor, similar to that of molasses. It is about half as sweet as white sugar. Barley malt syrup is best used in combination with other natural sweeteners.