Aldi and Lidl have been named as the worst supermarkets for price rises - but both budget retailers still work out cheapest for customers.
New research from consumer champions at Which? show overall food inflation at Aldi over a year was 19.6%. This was followed by Lidl, where overall inflation stood at 19%.
However, both discounters still tend to be the cheapest of the big supermarket chains to shop in overall.
The discounters were followed by Asda (15.2%), Morrisons (14.4%), Waitrose (14.2%), Sainsburys (13.7%) and Tesco (12.6%) in terms of overall inflation.
Ocado had the least inflation overall (10.3%).
The research from Which? also showed how prices of supermarket own-brand and budget ranges have gone up more than premium and branded foods.
In some cases, food had risen 175% during the cost of living crisis.
Which? tracked the annual inflation of tens of thousands of food and drink products across Aldi, Asda, Lidl, Morrisons, Ocado, Sainsbury’s, Tesco and Waitrose.
The biggest price increase on budget food was recorded at Tesco, which saw its Creamfields Soft Cheese ( 200G) rise from 49p to 84p - a 72% increase.
Sainsbury’s Simply Muesli (1kg) went from £1.20 in 2021 to £2.03 in the same period - up by 70%.
But mid-priced own-brand products tended to be where supermarket prices had risen the most.
Waitrose chocolate chip shortbread 200g almost tripled in price going from 82p to £2.25 - an increase of 175%. However Waitrose had some of the lowest inflation overall.
The second biggest increase on a single mid-priced own-brand product was the Asda Chilli Con Carne ready meal (400g) that went from £1.20 to £2.79 - a 132% increase.
The research compared the three months to October 31 in 2021 to the same period in 2022.
Sue Davies, Which? head of food policy, said: “Our inflation tracker lays bare the shocking scale of soaring food and drink prices - including on budget and own-brand products.
“While the data paints a bleak picture, we hope the tracker will help millions of people find the best possible value with their weekly shop during the cost of living crisis.
“We know the big supermarkets have the ability to take action and make a real difference to people struggling through the worst cost of living crisis in decades.
“That's why we’re calling on them to ensure everyone has easy access to basic, affordable food lines at a store near them, can easily compare the price of products to get the best value and that promotions are targeted at supporting people most in need.”
