Toblerone bosses have sparked outrage among customers after making a 'stupid' change to the product's famous triangular chunks.
Mondelez International, which makes the Swiss chocolate, has increased the gap between the peaks due to the rise in the cost of ingredients.
The controversial move means that Toblerone's 400g and 170g bars - both sold in the UK - now weigh just 360g and 150g respectively.
Fans have lashed out at the change, with some saying they feel 'cheated' by the decision to have larger gaps between the chocolate chunks.
One customer, Hannah Sassone, posted an image of one of the new bars on Toblerone's Facebook page, showing a distinctive change in shape.
She wrote: "Dear Toblerone, This picture of our bar this evening seems to be different to yours? Diet version???? #FeelCheated."
Another fan, Steven Barron, said: "Very disappointed, was good while it lasted... moving on to other things... terrible decision."
A third, Allison Reilly, asked Toblerone bosses: "What's going on?"
And a fourth, Rob Lynn, wrote: "Feeling a bit cheated by this Toblerone to be honest - more empty space than chocolate!"
In a statement on the page, the company explained that it had to change the look of the bars to ensure the product remains affordable.
It said: "Toblerone remains one of the best value and most delicious Swiss chocolate products in the market.
"This is because we always work hard to ensure we offer value for money for our consumers, but like many other companies, we are experiencing higher costs for numerous ingredients.
"We carry these costs for as long as possible, but to ensure Toblerone remains on-shelf, is affordable and retains the triangular shape, we have had to reduce the weight of just two of our bars in the UK, from the wider range of available Toblerone products."
Despite the changes in weight, the size of the bars' packaging remains the same, the BBC reports.
This led some furious customers to vow to give up Toblerone altogether.
Gary Davis said: "Won't be buying Toblerone anymore, I cannot believe the downsizing of the bars now - how big are the gaps between the peaks now!?? and yet keeping the packaging the same length!"
The firm replied: "Hi Gary, this is our 150g bar; the spaces have been made a bit bigger on this, but the other bars have the same amount of space as before. Thanks, Toblerone."
A spokeswoman for Mondelez said the change 'wasn't done as a result of Brexit '.
However, she could not clarify whether the move affected only bars in the UK.