Viennetta is an ice cream product made in Unilever factories and sold under the various Heartbrand logos around the world. It was launched first by Wall's in 1982 using a technique devised by Kevin Hillman, development manager at Wall's Gloucester factory. Viennetta comes in many flavours, including chocolate, mint and pineapple.
The original Viennetta was a multi-layered product comprising layers of vanilla ice cream with sprayed-on layers of compound chocolate. The layers of ice cream were extruded, one after another, onto trays sitting on a moving belt. The rate of extrusion was greater than the speed of the belt which caused a deliberate 'bunching' of the ice cream; each layer was extruded at a different speed to the previous layer. The final effect was akin to a series of waves rippling through the product. This visual aspect combined with the in-the-mouth contrast of the smooth ice cream covered in crisp compound chocolate to give the product an instant appeal.
Launched originally as a multi-portion dessert product, it has been so successful that Unilever, owners of Wall's, has produced many flavour and size variants, turning Viennetta into a worldwide multi million pound brand. Viennetta is sparsely available in the United States. However, Unilever no longer produces the brand in Canada. It is sold in Australia under the Streets brand.
The Viennetta was previously known as Comtessa in Spain due to a legal problem. It became Viennetta in the 1990s.