Cheese puffs (in the U.S.) or cheesies (in Canada), are a puffed corn snack, coated with a mixture of cheese or cheese-flavored powders. Cheese puffs is a generic name; Cheetos and Wotsits are the most common brand name. "Cheese puffs" often refers specifically to the baked, puffed variety. One variant is "cheese balls", such as those made by Frito-Lay under the Cheetos brand, or those made in New Zealand by Griffin's Foods.
Cheese puff is also a name for gougères, a choux pastry with cheese.