Vol. XV · Dry Heat Plate 3 of 11crowding, overcrowding, pan load, steaming, browning, batches, mushrooms, burner power, pan temperatureHT

Crowding the Pan.

A pound of mushrooms in one go turns into a grey, watery heap. Two batches brown in the same total time.

A hot pan holds only a modest store of heat, and a home burner adds back only a kilowatt or two (II.6). Put in a little cold food and the pan barely notices; put in a lot and its temperature falls sharply. Then a second problem starts: as the food heats, it releases water — mushrooms and spinach a great deal, meat some — and in a cool, crowded pan that water pools rather than boiling off at once. The food sits in liquid near 100 °C and steams, and browning stops (VIII.2).

So crowding is a load problem, like frying (IX.7). The cure is the same: smaller batches, a pan big enough for the food to sit in one layer with space between pieces, a heavy pan preheated well, and patience while the pan recovers between batches. The workshop loads a pan.

Below: the pan temperature after cold food goes in for a light load, a heavy load and yours, on the pan and burner you choose (stove bench), with the boiling point marked, and how long the pan sits near 100 °C.

What you will learn

Explain why crowding stops browning.
Estimate the load a pan can take.
Choose pan and burner for browning.
Cook in batches.

Workshop

Stove bench: a 28 cm pan preheated 5 minutes on the burner chosen (held below 240 °C), cold food at 5 °C releasing up to 25 % of its weight as water (mushrooms); the food covers the pan in proportion to its load. A lumped teaching model with one temperature for the pan.

One layer, room to breathe

On a gas burner a cast-iron pan with about 225 g of mushrooms falls only to 217 °C in this model and barely stews at all; with 900 g it falls to 109 °C and spends 6.3 minutes sitting in its own juice before it can brown. Even a strong induction hob leaves the 900 g batch stewing for 1.0 minutes. Two batches of 450 g, each in a hot pan, would brown sooner than the one big batch.

In practice: use the widest pan you have; leave space around each piece; preheat well; cook watery foods (mushrooms, spinach, courgettes) in small batches or let their water cook off before expecting colour; keep the first batch warm while the pan recovers. Sometimes stewing first is useful — mushrooms that release and then evaporate their water brown deeply at the end — but do it on purpose.

At the stove

Cook 500 g of sliced mushrooms twice: once all at once, once in three batches. Note how long each takes to brown and how they look.

Restaurant line cooks rarely crowd a pan because their burners are several times more powerful and their pans heavier; home cooks copying restaurant recipes often need to halve the batch.

Terms

Crowding: Putting so much food in a pan that it cools and the food steams.
Load: The amount of food added at once.
Recovery: The pan returning to temperature after food goes in.
Stewing: Food cooking in its own liquid near 100 °C.

Crowding cools the pan and pools the juices, so food stews at 100 °C. Cook in batches, in one layer, in a well-preheated heavy pan.

Sources

A teaching value chosen for the course: the right order of magnitude and shape, not a measurement of a particular food.