Twix Java Cookie Bars from Mars. TWIX Java Cookie bar is another in the line of crunchy, chewy chocolate TWIX is known for. With this variety, the cookie is chocolate-flavored and the caramel is now a coffee caramel. Try TWIX Java Cookie bar with a cup of coffee or a glass of milk. The bar is 1.79 ounces and you get 24 bars per box.