Simple:
* I ate a chocolate chip cookie after dinner.
* The bakery sells delicious cookies.
* My grandmother's recipe for oatmeal cookies is the best.
Figurative:
* That movie was a real cookie-cutter romance. (Meaning it was predictable and unoriginal)
* He's a cookie-cutter politician, saying whatever he thinks will get him elected. (Meaning he lacks originality or individuality)
Technical:
* The website uses cookies to track user preferences.
* We need to adjust the cookie settings to allow third-party tracking.
Humorous:
* My dog loves cookies, but he's allergic to nuts, so I have to bake him special cookies.
* I'm on a diet, but I can't resist the allure of a warm, gooey cookie.
The best way to use "cookie" in a sentence depends on the context and the message you want to convey.