Originally, chocolate chips were made of semi-sweet chocolate, but today there are many flavors. These include bittersweet chocolate chips, peanut butter chips, butterscotch chips, mint chocolate chips, white chocolate chips, dark chocolate chips, milk chocolate chips, and white and dark swirled chocolate chips.
Chocolate chips are also available in Europe, Australia, and other parts of the world. Nestlé and The Hershey Company are among the top producers of chocolate chips.
In 1987 Chester Soling sponsored a contest to find the best recipe for chocolate chip cookies and got over 2.600 responses for various recipes.