My grandson asked why I always set the oven timer but take the cookies out when I smell them

My grandson asked why I always set the oven timer but take the cookies out when I smell them.

Punchline

I told him the timer is for structure, honey. The nose is for results. One keeps me honest, the other keeps us from eating charcoal. It's called a balanced approach to baking—and also why Grandma's cookies are either perfect or a learning experience.