Marks & Spencer has launched a new limited-edition Chocolate and Cornflake Cookie that is causing a stir among shoppers, with social media users claiming people are 'fighting in the aisles' to get their hands on the £3.25 viral bakery treat.
The retailer's bakery, confectionery and chilled desserts have built up a huge cult following in the UK, with sweet treats regularly going viral on social media and being widely regarded as an affordable luxury. Products such as Percy Pigs, Colin the Caterpillar, loaded doughnuts and Munch Tins are renowned, but the M&S cookies are arguably the most sought-after product right now.
M&S divides its cookie range into three categories: the viral in-store bakery cookies sold loose or in paper bags, pre-packed all-butter cookies in the biscuit aisle, and bake-at-home frozen dough. It is the in-store cookies that tend to catch shoppers' attention.
New limited-edition flavour
The retailer stocks a broad selection of flavours in its standard bakery range, including Chunked N' Loaded Pistachio, White Chocolate & Raspberry and Classic Milk Chocolate Chunk. Seasonal and limited edition favourites also include Chunked N' Loaded Milk Chocolate, Malt & Caramel and Gingerbread and White Chocolate.
But the cookie that shoppers are currently going mad for is its Chocolate and Cornflake Cookie. The limited-edition flavour, which costs £3.25 for a bag of five, was launched on November 4, 2026. M&S describes the cookie as: "Rich, chewy cookies made with black treacle for a deep caramel flavour, with crunchy caramel pieces and crisp cornflakes, finished with milk chocolate."
Shoppers queue and scramble
The treat sparked lengthy queues at Foodhall bakery counters up and down the UK the moment it launched, with shoppers taking to social media to claim customers have been 'fighting' to get their hands on the cookie. TikTok users @foodieszn captured shoppers in one M&S frantically grabbing bags of the cookie the second they hit the shelves, with overlay text reading, 'Not everyone fighting because of the new Cornflake M&S cookies...'.
The clip swiftly went viral, clocking up more than 17,000 likes, leaving many viewers stunned by the scenes. One person wrote: "This is not the behaviour one expects from M&S customers." While another added: "What is the world coming to... just make them yourself, I did." A third chimed in: "Another reason I hate people, absolutely ridiculous." As a fourth added: "I literally can't bear this country."
A further clip shared by shopper Macy also captured customers forming queues for the cookies inside another M&S branch. Staff baking the treats were unable to even get them onto the shelves, instead being forced to hand them directly to waiting customers. Text overlaid on the post read, 'The M&S cookie trend is getting out of hand.'
It appears the situation varies across the UK, however, as one shopper commented: "I live in Norwich, there's loads just sat there on the shelves. Why's everyone going mad in other cities?"
Are the cookies worth the queue?
Reviews of the M&S Chocolate and Cornflake Cookies have been notably polarised since their launch. While TikTok buzz has been driving lengthy bakery queues and frequent sell-outs, everyday shoppers on Reddit, Mumsnet and food blogs remain divided - with many feeling the viral hype doesn't quite live up to expectations.
Shoppers who favour rich, dark baking flavours have praised the use of black treacle and dark chocolate, noting it delivers a toasted caramel depth rather than straightforward sugary sweetness. When baked to perfection, fans draw attention to the contrast between the soft, chewy dough, gooey chunks of chocolate and crisp pockets of cornflake - likening the experience to a "no-bake chocolate tiffin".
Those who tried them fresh from the bakery tray or enjoyed them alongside a cold glass of milk rated them considerably higher than those who ate them later in the day once they had cooled down.
