Shoppers have been warned they are paying an eye-watering £5,181 a year for groceries - with some items costing a third more.
Figures from analysts Kantar say food prices have risen by 12.4% on average over the past 12 months.
This means that the average weekly food shop now costs £5,181 a year - up £571 from £4,610 just 12 months ago.
Essential items which have seen huge rises include milk which has gone up 31%, butter 25% and dog food 29%.
Additionally, sales of the very cheapest own-label value products are up by 33% on a year ago, with almost one in four baskets containing these.
Fraser McKevitt, head of retail and consumer insight at Kantar, said: “It seems there’s no end in sight to grocery inflation as the rate at which food and drink prices are increasing continues to accelerate.
"In what is a fiercely competitive sector, supermarkets are reacting to make sure they’re seen to acknowledge the challenges consumers are facing and offer best value, in particular by expanding their own-label ranges.”
The market share of cheap supermarket Aldi went up 1.2% in the year.
Sales rose by 18.7% over the 12 weeks to September 4, reaching 9.3% market share, while fellow discounter Lidl increased its sales by 20.9% and its market share to 7.1%.
Government inflation figures are due out tomorrow.
But last month's figures showed increased food prices pushed inflation up the most - to 12.6%.
Here is how the increases break down:
Food price increases
- Low-fat milk 34%
- Butter 27.1%
- Pasta and couscous 24.4%
- Olive oil 23.6%
- Margarine and other vegetable fats 22.5%
- Jams, marmalades and honey 21.2%
- Sauces, condiments, salt, spices and culinary herbs 21.2%
- Cheese and curd 17.9%
- Ready-made meals 16%
- Potatoes 15.7%
- Eggs 14.6%
- Yoghurt 14.2%
- Pork 13.2%
- Edible ices and ice cream 12.9%
- Fish 12.8%
- Bread 11%
- Pizza and quiche 9.9%
- Fruit 8.5%
- Rice 6.7%
- Sugar 5.1%
Drink price increases
-
Mineral or spring waters 22%
-
Fruit and vegetable juices 14.8%
-
Coffee 12%
-
Tea 10.2%
-
Soft drinks 7.7%
-
Beer 3.2%
-
Spirits 3.1%
-
Wine 2.5%
Last week The Mirror reported that Morrisons is the supermarket which has increased prices the most out of the 'big four' - which includes Sainsbury's, Asda and Tesco.
Across 13,000 products, Morrisons prices have gone up by an average of 4.7% compared with August last year, according to Trolley.co.uk.
Tesco shoppers have been hit with a 4.6% increase on average, according to Trolley.co.uk data.
Sainsbury’s has seen prices rise by an average of 3.7%, while groceries from Asda and Waitrose have risen by 3.3% and 3.2% respectively.
Outside of the Big Four - Iceland saw the largest overall increase at 6.6%, followed by Aldi at 5.7% over 2,413 products.
What is inflation?
Inflation is a figure used to explain how much the prices of everyday essentials have increased.
When inflation is high, it means the cost of living has increased and you’re getting less for your money than you did before.
For example, if something cost £1 a year ago and now costs £1.02 today, that rate of inflation would be 2%.
