Price of family favourite treat up by 129% as cost of Britain’s best-loved groceries soars

MR Kipling’s exceedingly good cakes have become exceedingly expensive, watchdog Which? says.

A packet of six chocolate slices has gone from £1.16 to £2.66 — a rise of £1.50, or 129 per cent.

Mr Kipling’s Bakewell slices were runner-up, rising £1.38 to £2.75, a 98.7 per cent jump.

It makes the brand the worst price hike offender, a Which? food inflation tracker shows.

Mr Kipling’s owner Premier Foods recently said it would not increase prices further this year.

Which? also found Pilgrims Choice cheddar increased by 76.4 per cent, from £1.20 to £2.11.

And Quaker Oat porridge pots jumped from 92p to £1.60.

Sue Davies, of Which?, called the rises “barely believable”.

She said the increases “highlight the huge pressure faced by shoppers, especially families and those on low incomes”.

Supermarkets were recently cleared by the Competition and Markets Authority on food pricing as it was found that they had to be offering low prices or shoppers would switch to cheaper rivals.

Food companies, such as Mr Kipling’s Premier Foods, Kit-Kat maker Nestle or Cadbury owner Mondelez have profit margins that are at least six-fold bigger than supermarket margins.