If you have two steaks, one that's an inch thick, one that's 2 inches thick, how much longer does the thicker one need to cook? It's four times as long. It goes roughly like the square. How come cookbooks don't tell you that?

If you talk about sous-vide, then you have to talk about food safety, and microbiology, and heat.

Three things about water affect almost all of cooking. First are the hydrogen bonds, which is why it has an incredibly high boiling point. Another is that it's a polar molecule, so that it dissolves a lot of things, and there are things that won't mix with it. And then there's how much energy it takes to heat water.

Nathan Myhrvold Quotes