Lay's Numb & Spicy chips feature potatoes, vegetable oil, and a complex seasoning with key ingredients like Sichuan peppercorn powder, chili powder, MSG, soy sauce, garlic, onion, and other spices for that authentic Sichuan hot pot flavor, delivering both heat and a numbing "mala" sensation. Allergens often include wheat, soy, and milk, with some variations containing sesame or aspartame, so checking the specific package is important.