Change over time
In time the recipe had spread all over the world, over time the recipe had also been modified to satisfy every ones different tastes. For example the original recipe calls for nut but many people never put nuts in there cookies anymore either because they prefer no nuts or are allergic (being allergic to nuts was a very common thing). Or maybe they would add extra chocolate to make it a double chocolaty chip cookie, many people also make peanut butter cookies today as well, which is just adding peanut butter to the recipe with no nut or chocolate chips. Today the U.S. consumes 95.2% of cookies; this would mean 300 chocolate chip cookies eaten per person a year. In all, about 2 million cookies are eaten a year, and that’s just in the U.S.
