Browning and the Maillard Reaction

Meat fails to brown for one of three reasons: it is wet, the pan is cool, or you put too much in at once. Plus how the brown film stuck to the pan becomes your sauce.

What the Maillard reaction actually is

Amino acids and sugars, under heat, recombine into hundreds of aroma compounds. Roast meat, bread crust, coffee, soy sauce — all of it comes from this reaction. It is why boiled meat and seared meat are different foods.

There is one condition that matters: the surface has to get well above the boiling point of water. While there is water on the surface, the temperature stalls at 100°C and essentially no browning happens.

So the first thing is dryness

Pat the surface completely dry with paper towel.
Do not go straight from a wet package in the fridge into the pan.
Marinated meat has to be shaken off — soy-based marinades are especially wet.
Frozen meat needs to be fully thawed, then dried.

The second thing is not crowding the pan

This is the most common failure of all. Fill the pan and the moisture coming off each piece cannot escape; it drops the pan temperature, and you get grey, steamed meat instead of a crust.

You should see gaps between the pieces. Cook in two or three batches. It feels like twice the work, but meat that has steamed will never brown no matter how long you leave it. That is why the recipes for Pique Macho and Beef Stroganoff both insist on two batches.

The third thing is leaving it alone

Constant flipping cools the contact surface, so there is never enough time for a crust. Sear one side properly and turn it when it releases from the pan by itself. If it sticks, it is not ready.

The brown film in the pan is an ingredient

After the meat comes out, that brown layer stuck to the base — the fond — is concentrated Maillard product. Washing it away throws out half the flavour.

Deglazing: with the pan still hot, add liquid and scrape the base with a wooden spoon.

Wine or beer: acid and alcohol lift it well. Beef Stroganoff, Pique Macho.
Stock or water: neutral and reliable.
Vinegar or lemon: powerful in small amounts.

Reduce that liquid by half and it is already a sauce.

Caramelisation is a different reaction

Both go brown, but the mechanism differs. Caramelisation breaks down sugar alone (sugar, onion, carrot); Maillard needs sugar and protein together. The 40 minutes of onions in French Onion Soup is caramelisation; the browned cheese on top is Maillard.

Frying obeys the same rule

This is the reason Tangsuyuk and Karaage are fried twice. The first fry cooks the inside and drives moisture out of the surface; only in the second, hotter fry does Maillard browning happen and the crust turn golden and crisp. Fry once and you either burn the coating while the inside cooks, or pull it out pale.