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The original Viennetta was an Italian 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 causes festooning or bunching of the ice cream; each layer was extruded at a different speed from the previous layer. The final effect was akin to a series of waves rippling through the product, giving a concertina effect to the resultant confection.
Launched originally as a multi-portion dessert product, its success after being launched throughout KFC and Pizza Hut restaurants led to Unilever, owners of Wall's, producing many flavour and size variants. Viennetta is not widely available in the United States, and Unilever no longer produces the brand in Canada. It is sold in Australia and New Zealand under the Streets brand. It is sold in Italy in all supermarkets, as well as Germany and Austria. It is sold in Japan by Morinaga.
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