Bittman
Why does browned food taste so much better?
Hot pan, dry food, space, patience. Brown food tastes good.
When the surface of food gets hot enough — around 300°F — and dry enough, its proteins and sugars start reacting with each other and rearranging into hundreds of new flavor compounds. This is the Maillard reaction, and it's why seared chicken tastes roasty and complex while boiled chicken tastes like chicken-flavored water.
Two things stop it from happening: moisture and impatience. Water can't get hotter than 212°F, so a wet surface — or a crowded pan full of steaming food — never reaches browning temperature. It just steams. And because browning needs sustained contact with the hot metal, every time you stir or flip, you reset the process.
This one idea explains half the instructions in this app: preheat the pan (so the surface temperature is there from the start), pat meat dry (so there's no water to boil off first), don't crowd the pan (so steam escapes instead of hovering), and don't touch it (so contact does its work).
Deep brown is the goal. Black is carbon — that's burning, a different chemical process, and it tastes bitter. The window between them is wider than beginners fear.