KitKat's revealed the secret ingredient inside their chocolate layers

Ever wondered what the tasty filling is in between the crunchy wafers?

If you've ever snapped a finger and taken a peek inside, you would have noticed it's not the same colour as the deep brown chocolate coating reported The Sun.

Nestle's description is pretty vague, explaining the crispy wafers are moulded together with a "smooth and creamy chocolayer".

You may be surprised to hear, then, that the "chocolayer" is actually smashed-up KitKats!

That's why they're so good right? You're literally eating multiple KitKats at once (kinda).

The reason is that not all of the biscuits produced are up to scratch.

When they drop off the production line, technicians from the quality assurance team remove any KitKats that are deemed to be below par.

This could be because they aren't shiny enough, have too many exterior air bubbles or off-centre wafers, or any other imperfections.

According to the BBC's Inside the Factory programme, rather than throwing away the duds, the rejected bars are recycled back into the production process.

Go on then; have a break! Have a KitKat.