Twix is a caramel shortbread chocolate bar made by Mars. It consists of a biscuit base topped with other confectionery toppings and coatings, most frequently caramel and milk chocolate. Twix bars are packaged with one (mini and snack sizes), two or four bars (king size) in a wrapper. The bars comprise a crunchy biscuit base, topped with a layer of soft caramel, and are then enrobed in creamy milk chocolate.