Not so sweet! Popular Cadbury's chocolate recalled

Cadbury has issued a recall after blocks of its limited edition chocolate have been flying off supermarket shelves and popping up for a small fortune on eBay.

The chocolate giant has on Thursday urged customers to return any remaining 190g Cadbury Caramilk bars to the store purchased from, at risk of a food safety hazard.

Cadbury's Caramilk is a combination of caramel and milk chocolate, tasting like sweetened condensed milk.

The bars only began appearing on shelves a few weeks ago and have been throwing chocoholics into a frenzy ever since, selling out across the country.

In a statement Cadbury said “small flexible pieces of food grade plastic” were found in the product due to a “machinery fault”.

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The chocolatier warned customers not to eat the remaining blocks, as ingestion of the plastic could cause a “minor injury”.

The products at risk are only those with a best before date of 17 and 21 January 2019, and Cadbury assures other products including other dated Caramilk bars are safe to consume.

Cadbury said refunds would be issued even if blocks were partially consumed.

"Please take the remaining product and packaging back to your place of purchase for a full refund. No proof-of-purchase is required,” a spokesperson commented on Facebook.

The recall couldn’t have come at a worse time, given the blocks have been selling out in Woolies faster than you can say créme brulee.

Seven blocks of the elusive chocolate are currently selling on eBay for $150 - that's more than $20 a block.

First released in 1994, the limited-edition blocks became such an instant favourite and so scarce on the re-release that you can't even buy them from Woolworths' website.

Australian and Kiwi Instagram users have been posting pictures of their rare and precious Caramilk cargo, often stockpiling multiple blocks.