Liquor retailers are being offered huge discounts on Penfolds Grange for the first time in 35 years in what they say is a move by Treasury Wine Estates to clear out excess stock of Australia's iconic premium wine.

The Australian Financial Review spoke to a number of retailers across the country who confirmed they had been offered discounts of between 10 per cent and 30 per cent in the past few weeks to help move excess stock of the winemaker's 2009 Penfolds Grange.

Bright Food says it is not interested in adding brands like Penfolds to its expanding Asia Pacific food empire. Credit:Michele Mossop

"It's a cash discount," said one of the country's largest independent retailers, who asked to remain anonymous.

Asked if the retailer, who has been in the industry for 35 years, has ever been given a discount on Penfolds' flagship Grange product he said: "Never".