Twisties are a type of cheese curl corn-based snack food product, available mainly in Australia and other Oceanian countries. In Europe they are marketed as Fonzies, and in France as "Belin Croustilles". It was launched in 1950 by the General Foods Corporation. The brand name is owned by The Smith's Snackfood Company.

While originally an Australian-owned company, Smith's was acquired in August 1998 by Frito-Lay, which in turn is owned by American multi-national PepsiCo. In Malaysia, Twisties is a product of Mondelēz International, after having been a part of Danone and later, Kraft Foods previously. In Thailand, the Twisties trademark is owned by Lay's, which, like The Smith's Snackfood Company, is owned by PepsiCo.

In the early 1950s, Melbourne businessman Isador Magid imported a rotary head extruder from the United States which initially did not work. After bringing out a technical expert from the US as well as receiving valuable advice from the CSIRO, Magid started producing Twisties. The product was popular but large scale distribution was difficult so Magid decided to sell the machine and the brand in 1955 to Monty Lea from Darrell Lea for £12,000. Monty and his brother Harris experimented with the machine further using rice and various flavourings. Twisties became popular in Australia - some of its early success is attributed to promotional activity that included advertising the product on Graham Kennedy and Bert Newton's TV show In Melbourne Tonight, making it one of the earliest products advertised on that program. After an unsuccessful attempt to launch Twisties in the UK and competition for shelf space in Australia the Lea brothers agreed to sell the Twisties brand to the Smith's Snackfood Company.

During the late 1990s the Twisties brand went through a brand overhaul, coinciding with the acquisition of The Smith's Snackfood Company by Frito-Lay. During the brand overhaul the appearance of the packet was changed to a more modernised look, adopting its current logo. As well as this, the texture of the snack itself was altered, resulting in a smoother finish.

Twisties were originally available only in 'Cheese' flavour, but 'Chicken' and 'Wicked Cheddar Zig-Zag' flavours were later introduced and became a standard part of the product line. There have also been flavours abroad as diverse as 'Toffee', 'Tomato', 'Salmon Teriyaki' and 'Peri Peri', where the local palate suits them the most.

Twisties are eaten as a snack in themselves, or sometimes in a sandwich as a "Twistie buttie" or "Twisties roll", by serving the packet contents between two slices of buttered bread or in a roll.

In 1997, a Twisties batch was recalled after reports of consumers finding pieces of fine wire in packs, there were no reports of injuries. The company thought that the wire resulted from machinery malfunction. In 2014, Twisties were one of the products removed from shops in Malaysia due to concerns around contamination from pork products.

In 2001, Frito-Lay lost a trademark dispute with Aldi Stores, as Aldi's 'Chazoos' cheese twists were not considered to infringe on the registered trademark of Twisties on the basis of packaging, extrusion production or the sound of the product name. Aldi won the appeal as they argued that the phrase 'Cheezy Twists' described their product contents and was not used as their registered trademark.