The shortfall, expected to last into January, amounts to between 500 and 1,000 tonnes, said Tine, Norway's main dairy company, while online sellers have offered 500-gramme packs for up to 350 euros ($465).
The shortfall has been blamed on a rainy summer that cut into feed production and therefore dairy output, but also the ballooning popularity of a low-carbohydrate, fat-rich diet that has sent demand for butter soaring.
"Compared to 2010, demand has grown by as much as 30 percent," Tine spokesman Lars Galtung told AFP.
Last Friday, customs officers stopped a Russian at the Norwegian-Swedish border and seized 90 kilos of butter stashed in his car.
This was hysterical:
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|Norway's Butter Shortage|