Dan Dan sauce is a spicy and flavorful Sichuan-style sauce commonly used in Chinese cuisine. It is typically used as a seasoning for noodles, but can also be used as a dipping sauce or marinade for meat. The sauce gets its name from the long bamboo pole called "dan dan" that street vendors used to carry the noodles and sauce on their shoulders.

The sauce is made with a combination of ingredients, including chili oil, Sichuan peppercorns, sesame paste, soy sauce, vinegar, and sugar. The chili oil and Sichuan peppercorns give the sauce its characteristic numbing and spicy taste, while the sesame paste adds a nutty flavor and creamy texture. The sauce can be adjusted to taste by adding more or less of the spicy and sweet ingredients.

When used as a seasoning for noodles, the sauce is typically combined with ground pork, scallions, and pickled vegetables to create a savory and spicy noodle dish. It is a popular and delicious dish in Sichuan cuisine and can be found in many Chinese restaurants around the world.