Penguin bars are up there with some of the most iconic British lunchtime treats.
They're crunchy, chocolatey, gooey - and they even come with a not-so-funny joke - what more could you ask for?
But apparently, Penguin bars are actually just chocolate covered Bourbons - and it's blowing everyone's minds.
Jake, the creator behind the @anoynomousaccount on TikTok, made the discovery after dipping the chocolate bar into his cup of tea.
In a video that has been viewed more than one million times, Jake showed that once the chocolatey coating had melted, a biscuit that looked scarily similar to a Bourbon. was hiding beneath it.
It was captioned: "How old were you when you found out a Penguin was a Bourbon covered in chocolate!!!!"
Since being posted, the video has racked up more than 170,000 likes and 12,000 comments from stunned viewers.
One person who was left in disbelief said: "Naaaaaaaaaaa stop."
Another baffled viewer wrote: "Wait but I hate Bourbons but love Penguins?"
"BYE I JUST ATE ONE TODAY AFTER YEARS AND THIS WAS MY EXAT THOUGHT WHILST EATING IT," commented a third.
While someone else admitted: "Today years old."
But not everyone was convinced as one person said: "Na, different taste to a Bourbon."
"I feel like they've just dunked a Bourbon in tea and said it was a Penguin bar," said another.
This isn't the only chocolate treat that's got people talking recently.
Tesco sparked a debate among customers after it asked which aisle McVitie's new Jaffa Jonuts should be stocked.
On Twitter, it gave shoppers the choice between the cake, biscuit or donut aisle - and there were some pretty controversial suggestions.
Take a look here.
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