Crinkle-cutting is slicing that leaves a corrugated surface. It can be done to enhance the texture or mechanical properties of food. Crinkle-cutting French fries may improve their crispiness, as well as their ability to retain dipping sauce.^[1]

Pommes gaufrettes, grid fries, waffle fries, crinkle-cut or criss-cross fries are fries obtained by quarter-turning the potato before each pass over the corrugated blade of a mandoline and deep-frying. This increases the surface area relative to the volume, exposing a larger area to the cooking process and allowing more water vapor to escape, resulting in a product that is crisper, and perhaps tastier as more of it is subject to the browning and flavor-producing effects of the Maillard reaction which takes place during cooking.^[2][3]

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  Ruffled potato chips
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  Sweet potato fries or "wavy fries"