let him cook

"Let him cook" is a colloquial phrase used to express that someone should be allowed to proceed with their actions or ideas without interruption, even if their methods seem unconventional or confusing at first. The mental image is that of a chef in a kitchen; just as you wouldn't disturb a cook while they are perfecting a complex dish, you should give this person space because they are likely working toward a successful or impressive result. The phrase is highly informal and is most commonly used in internet culture to describe someone who is "in the zone" or displaying high levels of skill. While it started in hip-hop culture, it is now used broadly to defend someone who is taking a creative risk or working on a project that requires focus and time to "come together."
In conversation
Gaming session
Why is he just standing in the corner of the map?
Why is he just standing in the corner of the map?
Relax, he's setting up a trap. Let him cook.
Relax, he's setting up a trap. Let him cook.
Used to defend a teammate's strange strategy.
Creative brainstorming
Should we stop him? He’s been sketching for three hours.
Should we stop him? He’s been sketching for three hours.
No way, look at the detail. Let him cook.
No way, look at the detail. Let him cook.
Used when someone is clearly onto something great.
Examples
Don't interrupt the developer now; let him cook.
Don't interrupt the developer now; let him cook.
He's making a mess in the kitchen, but let him cook—the smell is amazing.
He's making a mess in the kitchen, but let him cook—the smell is amazing.
The rookie coach has an unconventional strategy, but we have to let him cook to see if it pays off.
The rookie coach has an unconventional strategy, but we have to let him cook to see if it pays off.