Twix is made my Mars, Inc and was originally made in the UK in 1967. It didn’t make it to the US until 1979. Mars, Inc was founded in 1911 in Tacoma, Washington. The Twix is made of a biscuit with a thin layer of chocolate followed by a layer of caramel with the whole thing coated in chocolate.
Its name came from a combination of the words twin and sticks. Twix was called Raider in much of Europe until it was officially changed in 1991 to match its internationally known name.
Here in the US, the Twix bar is produced in Cleveland, Tennessee. There are many variations of the Twix candy bar. In North America we have the Twix Peanut Butter candy bar where peanut butter replaces the caramel.
Other interesting variants are the Twix Coconut, Twix Java, and Twix Mint. Many odd types of Twix were introduced in the early 1990s, but they didn’t last long at all.