Cornflake topping is crushed cornflakes tossed with melted butter or oil, then baked or toasted until golden and crisp, and scattered over a dish rather than pressed onto raw food before cooking, as with a cornflake crust. It adds crunch to casseroles like green bean casserole and macaroni and cheese, and to baked desserts such as apple crisp and coffee cake.
It can be seasoned savory, with salt, pepper, garlic powder, or herbs, or sweet, with brown sugar, cinnamon, or a little maple syrup, and is typically baked at around 350°F (175°C) until browned.