Kitkats’ insides are made from mashed up Kitkat mishapes
This popular chocolate wafer-bar is binded together with crushed up KitKats. During the production process quality assurance technicians remove substandard bars which are then crushed up and used to make the smooth and creamy chocolayer. It begs the question: What did they use for the first batch?
Source:
http://www.mirror.co.uk/news/weird-news/filling-between-kitkat-wafers-something-9568383
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