Food giant Kellogg's has replaced whole rice grains with milled flour in its flagship Rice Krispies cereal, triggering consumer anger over missing crisp sound and new allergen risks.

The recipe update removes whole toasted rice from both Rice Krispies and Coco Pops across the UK. Rice Krispies now uses rice flour, while Coco Pops contains a mix of rice flour and corn flour.

The shift has muted the cereal's famous sound, which has anchored its marketing since the 1950s.

A Kellogg's spokesperson confirmed to the BBC that customers 'might notice that the sound may be quieter and not as instant as before'.

Parents and long-time buyers quickly took to social media to criticise the new texture and taste, with some calling the breakfast staple 'grim' and 'stale'.

'There's no snap, crackle and pop in these,' one mother wrote on TikTok. 'My toddler won't eat them.'

Another shopper noted: 'I had a bowl of the new recipe and you can immediately tell the difference. They don't have the snapping sound when you put in the milk.'

Recipe Reformulation Introduces Wheat Gluten Allergen Risks

Beyond changes to crunch and flavour, the processed flour recipe presents immediate medical consequences for vulnerable shoppers.

Under the previous formula, boxes carried a voluntary 'may contain gluten' warning because factories handled other grains. The new recipe adds wheat gluten directly into the ingredient mix as a primary component.

Consequently, both cereals now feature mandatory allergen labelling and are no longer safe for people with coeliac disease or wheat allergies.

The sudden ingredient shift prompted fierce online backlash from shoppers comparing the brand with supermarket alternatives.

'Kellogg's couldn't absorb that cost into the hundreds of millions of pounds of profit they make each quarter,' one user stated.

Another consumer highlighted the ingredient difference: 'Just comparing Kellogg's Rice Krispies with Tesco Rice Snaps... Kellogg's uses rice flour and wheat gluten, while Tesco still uses whole rice. The ingredients and the price just make sense.'

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Climate Disruptions Hit Global Grain Supply Chains

Kellogg's defended the change, saying extreme weather had disrupted international grain crops.

The manufacturer pointed to severe droughts and heatwaves in Spain during 2022 and 2023, which reduced supplies of the specific rice types used in its cereals.

The manufacturer maintained that the recipe alteration will not affect the core products sold in the United States and Canada, which operate under separate corporate management.

Nutritional Standards and Ultra-Processed Food Scrutiny

Growing public concern over ultra-processed food has placed commercial breakfast cereals under intense scrutiny from public health campaigners.

Kellogg's insisted that the core nutritional values of both products remain completely unchanged despite the shift to flour bases.

The firm stated that each serving maintains identical levels of dietary fibre, iron, and vitamin D, without added artificial colours or flavours.

Both products also meet UK government guidelines classifying them as non-HFSS, meaning they avoid excessive levels of fat, salt, and sugar.

Consumers managing coeliac disease or wheat intolerances are advised to check product labels carefully, as reformulated boxes carry bold allergen warnings.

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