The price of basic groceries such as butter, milk and cheese went up 30% year-on-year at some supermarkets in December, figures show.
While overall food and drink inflation reached 15% in December across the eight major supermarkets, butters and spreads rose by an “astonishing” 29.4%, according to tracking by consumer group Which?
Milk was 26.3% more expensive than a year before, while cheese (22.3%), bakery items (19.5%), water (18.6%) and savoury pies, pastries and quiches (18.5%) also saw higher-than-average price increases.
Among the worst examples of inflation over the three months to the end of December included Utterly Butterly 500g, up from £1 to £1.95 across several supermarkets, Waitrose Duchy Organic Homogenised Semi-Skimmed Milk (1 pint/568ml) rising 87.1% from 65p to £1.22, and Creamfields French Brie 200g at Tesco up 81.6% from 79p to £1.43.
Across supermarket ranges, inflation was significantly higher on budget ranges (20.3%) and own-brand items (18.5%) than premium (12.6%) and branded (12.5%) alternatives, just as consumers turned to the cheaper options to cut food bills.
Which?’s supermarket food and drink inflation tracker records the annual inflation of tens of thousands of food and drink products across three months at eight major supermarkets – Aldi, Asda, Lidl, Morrisons, Ocado, Sainsbury’s, Tesco and Waitrose.
Despite being the cheapest supermarkets overall, Lidl’s prices went up the most in December (21.1%), followed closely by Aldi (20.8%), according to Which?’s figures.
Asda had the third highest inflation at 15.4% – but closer to the industry average of 15% – followed by Waitrose (14.5%), Sainsbury’s (13.7%), Tesco (13.1%), Morrisons (12.9%) and Ocado (10.5%).
But Which?’s latest Consumer Insight survey also shows that trust in supermarkets is plummeting, from positive 67 in May 2021 to positive 42 now.
Waitrose had the lowest level of trust (positive 29) among all consumers, although trust levels among its own customers is significantly higher at 54.
Price rises emerged as a common reason for a lack of trust, particularly the perception prices were sometimes artificially inflated and went beyond what was necessary for businesses to offset their own rising costs.
Which? is campaigning for all supermarkets to ensure budget line items that enable a healthy diet are widely available, particularly in areas where people are most in need.
It is also calling on retailers to make pricing and offers more transparent and provide targeted promotions to support people in the areas struggling the most with access to affordable food.
Which? head of food policy Sue Davies said: “We know food prices have risen exponentially in the last year and our inflation tracker shows the dramatic impact this is having on everyday products at the supermarket.
“Some households are already skipping meals to make ends meet and our findings show trust in supermarkets taking a hit as many people worry they are putting profits before the people suffering during this cost-of-living crisis.
“Supermarkets must do more. Which? is calling for them to ensure everyone has easy access to basic, affordable food ranges at a store near them, particularly in areas where people are most in need, as well as pricing which enables people to easily work out best value and promotions to support people who are particularly struggling.”
An Asda spokesman said: “We’re working hard to keep prices in check for customers and remain the lowest-priced major supermarket – a position recognised by Which? in their regular monthly basket comparison which has named Asda as the cheapest supermarket for a big shop every month for the last three years.”
An Aldi spokeswoman said: “We are the lowest-priced supermarket in Britain. Our customers will always pay less for their shop with Aldi and that is why Which? has named us as the cheapest supermarket in 2022.”
Tesco said: “With household budgets under increasing pressure, we are absolutely committed to helping our customers by keeping a laser focus on the cost of the weekly shop. Earlier this week, we were pleased to be recognised by The Grocer as the retailer doing the most to keep prices down right now.”
Andrew Opie, director of food and sustainability at the British Retail Consortium, said: “Retailers understand the pressure households are under and are doing everything they can to limit price rises on their products.
“Unfortunately, the war in Ukraine has pushed up the cost of many items including wheat, fertiliser and animal feed, as well as global energy prices, leading to higher prices for many staples.
“Despite these challenges, retailers are determined to support their consumers with the cost of living and provide local communities with easy access to affordable food by expanding value ranges, keeping the price of essentials down and introducing discounts for vulnerable groups.
“Fierce competition for customers is also helping to keep prices as low as possible, despite the spiralling costs retailers face.”