In a large bowl combine the cake mix, flavor creation packet, and butter. Mix well until combined.
Beat in the egg.
Add the lime juice and mix until combined.
Fold in the white chocolate chips.
Drop the cookie dough onto a cookie sheet by heaping tablespoon. Spread the cookies 2 inches apart. Bake for 11-13 minutes or until the cookies are firm and beginning to brown. They will look undercooked but they are fine.
Allow the cookies to cool on the cookie sheet for 2 minutes then remove to a wire rack to cool completely.