天かす is a Japanese culinary ingredient made from the leftover bits of batter that are produced when making 天ぷら, a popular dish of deep-fried vegetables and seafood. These crispy bits are light and airy, adding a delightful crunch to various dishes. Often used as a topping, 天かす can enhance the flavor and texture of foods like うどん (udon noodles) and そば (soba noodles). It is also sprinkled on rice or used in salads, making it a versatile ingredient in Japanese cuisine.