What is the best selling cookie?

It's impossible to say definitively which cookie is the "best selling" globally, as sales data isn't readily available across all countries and companies.

However, we can make some educated guesses based on popularity and market share:

* Chocolate chip cookies: These are undoubtedly a global favorite and likely a top contender for best-selling. Their popularity stems from their simple yet delicious combination of chocolate and buttery dough.

* Oreo cookies: This iconic sandwich cookie, with its creamy filling and chocolate wafers, is a massive worldwide hit. Nabisco, the maker of Oreos, has claimed it's the best-selling cookie in the US.

* Shortbread cookies: Popular in many countries, shortbread's simple butter and flour base makes it a versatile cookie for different flavors and occasions.

* Sugar cookies: Another classic, these cookies are loved for their simple sweetness and ability to be decorated for holidays and events.

Ultimately, the "best selling" cookie likely varies by region, brand, and individual preferences. But these contenders are definitely among the most popular choices worldwide.