Using melted butter in chocolate chip cookies will change their texture, resulting in flatter, denser cookies with a fudgy center.
According to provided information, cookies made with melted butter tend to:
- Deflate and become denser when they cool.
- Develop a perfectly cooked, fudgy center. This is similar to the texture of brownies that are banged against an oven rack mid-bake to deflate them. Sarah Kieffer's pan-banging cookies also achieve a pleasantly compact texture through a similar technique.
In summary, if you're looking for a chewier, denser chocolate chip cookie with a fudgy texture, using melted butter is a good technique to try.