Dal in Pressure Cooker: How Many Whistles and Water, Every Daal

Stop counting whistles. The honest answer to “dal in pressure cooker how many whistles” is that red masoor needs about one, arhar three to four and soaked rajma five or six, but the number that really works is minutes: bring the cooker to its first whistle on high, then time it on low. This guide gives both, plus the water for every daal, what changes at a hill station, and why some daal refuses to go soft however long you cook it.

Why counting whistles misleads you

A whistle is only the weight on the vent lifting when the steam pressure inside gets high enough to push it up. How often that happens depends on things that have nothing to do with how cooked the daal is.

• Flame: on high, a cooker whistles every minute or so. On low it may take four or five minutes. Same daal, same doneness, very different count.
• Cooker size: a 3 litre cooker with one cup of daal gets to pressure far faster than a 7 litre one with the same amount inside.
• Fill level and water: more water takes longer to heat and whistles later.
• Gasket and weight: a worn gasket leaks steam, so the whistle comes late or not at all. If that’s happening, our whistle and gasket safety guide shows what to check.

Minutes after the first whistle are much steadier. Once the cooker is at pressure, the temperature inside sits at roughly 120 °C whatever your flame is doing, so ten minutes at pressure is ten minutes of cooking in any kitchen.

How many whistles for every daal: the chart

Water is per cup of daal measured dry, for a normal, pourable daal. Whole pulses are soaked first. “After first whistle” means on a low to medium flame. The whistle count is what most 3 to 5 litre cookers give on medium heat, for people who’d rather count.

For chana daal that should stay in whole grains for daal gosht, stop at 1 whistle. For a smooth, mashed daal, add a minute or two to any split daal. Masoor gets its own detailed treatment, with tarka, in our masoor daal guide, and the rest of the Grains, Daals & Pulses section covers each pulse on its own.

Dal in pressure cooker: how much water, and the method that works

A pressure cooker loses very little water to steam, so you need less than on the stove. Too much gives thin daal you have to boil down; too little risks scorching on the base. The chart’s figures give a pourable daal. For thick, dry-style daal (Pakistani mash ki daal, chana daal for daal gosht), drop to about 1.5 to 2 cups.

1. Wash 1 cup of daal 2 to 3 times. Soak if the chart says so, then drain.
2. Put it in the cooker with the water from the chart, 1/2 tsp haldi and 1 tsp oil or ghee (the oil keeps the foam down).
3. Check the fill: daal and water together should not go above the halfway mark.
4. Close the lid and cook on high until the first whistle.
5. Turn the flame to low, and start timing from that moment.
6. Switch off when the time is up. Leave the cooker alone for 10 to 15 minutes until the pressure drops by itself. That resting time is still cooking, and it’s included in the chart.
7. Open, whisk with a mathani or the back of a ladle, add salt, and adjust thickness with hot water before the tarka.

Don’t lift the weight to release steam with daal inside. Starchy foam sprays out through the vent, burns hands, and can clog it for next time.

Why pulses cook faster in a pressure cooker

This is the school science question, and the answer is simple. In an open pot, water can’t get hotter than its boiling point, about 100 °C at sea level. Sealing the cooker traps steam, the pressure rises, and water under pressure boils at a higher temperature, around 120 °C in a standard cooker. Hotter water softens starch and cell walls much faster, which is why a sabut mash that needs well over an hour in a handi is done in about 25 minutes under pressure.

Did you know? Each whistle lets out a puff of steam, and with it a little water, so a cooker left whistling on high flame for many whistles can run dry and scorch. Low flame after the first whistle is gentler on the daal and on the base.

Hill stations and altitude: add time

Water boils at a lower temperature the higher you go, by roughly 1 °C for every 300 m. In Murree, at about 2,300 m, open-pot water boils at around 92 °C, which is why daal in a handi there seems to take forever. The pressure cooker still helps a great deal, but it also runs a little cooler than at sea level.

• The rule cooker makers give: add about 5 percent to the cooking time for every 300 m above 600 m.
• Quetta (about 1,700 m): roughly a fifth more time.
• Murree, Shimla, Nathia Gali (2,200 to 2,500 m): roughly a quarter to a third more.
• Soak whole pulses fully, and at altitude cook rajma in the pressure cooker rather than an open pot.

Why daal stays hard, and how to fix it

You followed the chart and the chana is still like gravel. There’s nearly always a reason.

• Old stock. Pulses stored a long time, especially in heat and humidity, become “hard to cook”. Their cell walls stiffen and no amount of whistling fully softens them. Buy from shops with fast turnover, and store well.
• Hard water. The calcium and magnesium in hard water firm up the pectin that holds bean cells together. If your kettle scales up white, this is likely. Use filtered water, or add a small pinch (about 1/8 tsp) of baking soda per cup of daal.
• Acid too early. Tomato, imli, amchur, lemon and dahi slow softening a lot. Add them in the tarka, after the daal is soft.
• Not soaked, or soaked in too little water. Grains that poked above the water stay hard.
• Salt early? Less of a problem than people think. It can slow some daals slightly, so if yours are stubborn, salt at the end.

The rescue: add 1/2 cup of hot water, close the cooker, bring back to the first whistle and give it 5 more minutes on low. Repeat once if needed. If it’s still hard after that, the stock is old; mash it into a thick daal, or grind for tikki, rather than burning gas on it.

Myth: pressure cooking kills the goodness in daal

It doesn’t. Shorter cooking in less water tends to keep more of the heat-sensitive and water-soluble vitamins than a long open simmer, and protein and fibre are not “destroyed” by pressure. The full comparison, including the rajma question, is in pressure cooker vs slow cooking. The one real way to spoil daal in a cooker is to overcook it into grey paste with ten whistles on high flame.

Pressure cooker daal questions, answered