Ask HN: Duolingo or Treehouse for cooking?

I've been looking for something like Duolingo or Team Treehouse for cooking. Some place to learn to cook in a semi-structured, guided but fun way.

Evan Cooke (CTO of Twilio) wrote a post awhile back about wanting to see this [0].

Has anyone seen something like this?

[0]: www.evancooke.com/2012/01/22/gamification-of-cooking.html