Twix Caramel Cookie Bars were introduced in 1979 and these tasty bars are packed with a biscuit finger cookie, caramel and then drenched in milk chocolate. Here's a fun piece of trivia - The Twix Caramel Cookie Bar was introduced in France and Germany and was known as the Raider Bar and It wasn't until 1991 that the name was universally changed to Twix Caramel Cookie Bar!