An engineer’s idea, a moving belt and a Christmas launch.

Viennetta is a British invention. The idea of an ice cream gateau built from alternating layers of ice cream and chocolate-flavour coating was developed in 1981 by Kevin Hillman, a product development manager at Wall’s, Unilever’s British ice cream company, Unilever UK says. English Wikipedia places him at Wall’s factory in Gloucester and credits the product and its production technique to Hillman together with Ian Butcher and Gordon Stewart Carrick.

All three men are named as inventors on the British patent application GB 2143718A, “Composite confection products,” filed by Unilever PLC with a priority date of 26 August 1981 and published in February 1985. It describes extruding thin layers of aerated frozen confection, each less than 5 mm thick, through slotted outlets onto a conveyor, with very thin sprayed coatings of a fat-based material between them. English Wikipedia explains the effect: the ice cream was extruded faster than the belt moved, so each layer bunched into folds, and each layer ran at a different speed from the one before, so the finished block shows a series of ripples, like a concertina. Unilever UK describes the result as waves of soft ice cream flowing over crisp chocolate layers, with an “unmistakable crack.”

Viennetta was launched in 1982 as a Christmas speciality, Unilever UK says. The design-history blog Let’s Look Again, writing in 2014, quoted the business historian Geoffrey Jones, author of a history of Unilever, as saying that Viennetta introduced the idea of the branded ice cream dessert, with ice cream as the main dish rather than an accompaniment.

More flavours, thicker layers and a world record.

A long-running British television campaign for Viennetta used the line “one slice is never enough,” which is still used from time to time, English Wikipedia says. Unilever UK’s own history of the brand lists the changes that followed. The 1990s brought new flavours, among them Mint, Strawberry, Cappuccino and Praline, and thicker, wider chocolate-flavour layers, which the company says were 25% larger. In 1993 a promotion offered sets of diamond necklaces and earrings as prizes. In 2004 a Selections range added fruits of the forest, chocolate brownie and double crisp, and for the dessert’s 21st birthday the traditional ice cream wave was made bigger.

For the 25th birthday, in 2007, Wall’s made a Viennetta 22.7 metres long, which Unilever UK and English Wikipedia both describe as a world record for the longest ice cream. Unilever UK says Mint and Vanilla remained the two favourite flavours, and that Strawberry joined the range for the summer of 2013. In 2022, the centenary of the first Wall’s ice cream, the brand released a Viennetta Birthday Cake with vanilla and strawberry layers and sprinkles, and, for that Christmas, a Chocolate Yule Log. The Wall’s website listed Vanilla, Mint and Salted Caramel as the three flavours on sale in Britain in 2024.

The dessert has travelled widely under Unilever’s local ice cream names, known together as the Heartbrand brands. English Wikipedia says it is sold under the Streets name in Australia and New Zealand and by Algida in Italy, and in Germany, Greece and Austria; that in Israel Strauss sells it as Fantasia; that in Finland it carries the Ingman name; and that in China it is called Qiancengxue, “thousand-layered snow.” In Spain it was once sold as Comtessa before taking the Viennetta name in the 1990s.

Design and documentation.

The seven brands in this group all make ice cream, and all of them are sold in Britain: Wall’s, Carte d’Or, Mackie’s, Kelly’s of Cornwall, Little Moons, Viennetta and Solero. Ice cream brands sold in Britain in general sit at many different points in the trade, from family firms that still carry a founder’s surname to names that now belong to much larger food groups, and a single brand can be sold everywhere from a seaside kiosk to a supermarket freezer.

An ice cream brand’s identity is usually carried less by a single product than by a pack, a name and the treat it promises, because the company behind the name may have changed hands, moved its factory or grown far beyond the place where it started. That makes the questions behind each name worth asking plainly: who started it, who owns it now, and where its ice cream is actually made and packed.

Each guide separates what independent sources record from what the company says about itself — its founding story, its owners over time, where its ice cream is made and how its packaging has changed — and marks plainly what rests only on the company’s own word.

Comebacks abroad, a Gloucester factory and a new owner.

Viennetta’s life outside Britain has been a story of exits and returns. English Wikipedia says it was introduced in the United States and Canada in the late 1980s under the Breyers brand, withdrawn in the mid-1990s and brought back in the US in 2021 under the Good Humor name. In Indonesia it was sold from the mid-1990s to the mid-2000s and returned in April 2020 after a petition signed by almost 75,000 people; it came back in Thailand in November 2020; and in Mexico it was reintroduced by Holanda in 2018 after an online petition. In Japan Morinaga Milk Industry sold Viennetta from September 1983 until 31 March 2025, when it stopped because its licence ended, Kyodo News reported in February 2025.

The British dessert is still made where it was devised. Unilever built its ice cream site in Gloucester from 1959 and, in the mid-1980s, moved all its British ice cream manufacturing there, English Wikipedia says. In November 2025 The Magnum Ice Cream Company announced a £50 million upgrade of the plant, which it called the largest ice cream factory in Britain and the second largest in Europe; Dairy Industries International reported that it employs almost 500 people and makes nearly two million Viennettas a week, alongside Calippo, Magnum, Solero and Twister.

Unilever completed the demerger of its ice cream business on 6 December 2025, and The Magnum Ice Cream Company, based in Amsterdam, began trading on Euronext Amsterdam, the London Stock Exchange and the New York Stock Exchange on 8 December 2025, Euronext announced. Viennetta now belongs to that company, alongside Wall’s, Magnum, Cornetto and Ben & Jerry’s.

For a design guide, Viennetta shows how a manufacturing patent can become a brand: the ripple that the machine makes is the thing people recognise. Compare Wall’s, the British ice cream name that launched it, Cornetto, a sibling under the same Heartbrand, and Magnum, the stick bar that gave the new company its name. For this guide we use a cocoa brown, a vanilla cream and a mint green with a high-contrast serif, an unofficial interpretation; no product or logo is reproduced.

Keep Viennetta’s identity on hand — save it to a board in the Made Good inspiration library.