I inherited a pressure cooker and did not use it for two years. The noise alarmed me, I had heard the stories, and I could not see what it did that a pot could not do slowly.
It is now the pan I use most days, and the two years of avoidance were based on a misunderstanding of what it is for.
What it actually does
Water boils at a fixed temperature at a given pressure. In an open pot at sea level that is around a hundred degrees, and no amount of extra heat makes the water hotter — it just boils faster.
Sealing the pot raises the pressure, which raises the boiling point. The contents cook at something closer to a hundred and twenty degrees.
That twenty degrees is the whole thing. Reaction rates roughly double for every ten degrees, so cooking that takes an hour and a half in a pot takes something like twenty five minutes.
It is not a magic device. It is a way of cooking above the temperature that water normally allows.
What it is good at
Anything that takes a long time because tough material needs to break down.
Dried pulses, which go from hours to minutes. This alone justifies owning one in any kitchen that eats pulses regularly.
Tough cuts of meat, where collagen needs time and heat to become gelatine.
Stocks, where long extraction is the point, and where the sealed environment also means nothing evaporates.
Whole grains, beetroot, and anything else that is dense and slow.
What it is bad at
Anything where you want evaporation. A sauce will not reduce in a sealed pot, which means anything that should thicken by cooking down needs a period with the lid off.
Anything delicate. Green vegetables go grey and collapse. Fish disintegrates. Anything where texture is the point is generally worse.
Anything you need to taste and adjust as it goes, since opening it is a process.
And browning, which happens above the temperatures a wet sealed environment can reach. You brown first, in the same pot, and then seal.
The safety question
The thing that kept me away, and the honest position is that modern cookers are considerably safer than their reputation.
They have multiple independent pressure release mechanisms, and lids designed so that they cannot be opened while pressurised. The accidents that formed the folklore mostly involved older designs, blocked vents, or forced lids.
What genuinely matters in practice: keeping the vent clear, not filling beyond the marked line, checking the gasket for cracks and replacing it when it perishes, and not attempting to force the lid.
Foods that foam — some pulses, oats, pasta — can block the vent, which is the main real risk. Filling less full and adding a small amount of oil reduces the foaming.
The whistle count problem
Every Indian recipe specifies whistles and nobody explains that this is not a standard unit.
A whistle is a release of pressure, and how often it happens depends on the heat under the pot, the amount of liquid, the specific cooker and how full it is.
Three whistles on a high flame with a small quantity is a completely different amount of cooking from three whistles on a low flame with a full pot.
What I do now is note the time from the first whistle rather than counting, once I worked out what actually worked for a given dish in my own cooker. The whistle count in a recipe is a starting point from somebody else's kitchen.
Release method changes the result
Something I did not know for a long time.
Letting the pressure drop naturally means the contents continue cooking for another ten or fifteen minutes as the temperature falls slowly. That is significant additional cooking.
Releasing the pressure quickly stops the cooking almost immediately.
So the same recipe with different release methods produces noticeably different results, and recipes frequently do not specify. For pulses I let it drop naturally; for anything I want to stop, I release.
What changed once I understood it
I stopped treating it as a specialist item for one dish and started using it as the default pot for anything slow.
Brown first with the lid off. Seal and cook. Open, adjust, reduce if needed.
That sequence covers an enormous proportion of what I cook, in about a third of the time, in one pot.
The two years it spent in the cupboard were entirely down to nobody explaining the mechanism, which took about ten minutes to understand once I bothered.
Altitude matters
Worth mentioning because it explains a category of confusing failure.
At higher altitude, water boils at a lower temperature, which is why cooking anything takes longer in the hills and why pulses that cook in twenty minutes at sea level can take an hour.
A pressure cooker largely solves this, which is why it is close to essential in high places and merely useful in low ones.
It also means recipe timings written for one altitude do not transfer, and a recipe that works perfectly in one city can be consistently wrong in another for reasons that have nothing to do with the cook.