Layu, or Japanese chili oil, is a spicy and aromatic condiment commonly used in Japanese cuisine. It is made by infusing oil, typically sesame oil, with chili peppers, creating a fiery and flavorful oil.
Chefs use layu to add a burst of heat and a smoky depth to a variety of dishes, such as ramen, gyoza, and stir-fries, or as a condiment to drizzle over foods for an extra kick of spiciness.