Whole Green Moong Dal Recipe With a Mustard Oil Tadka (2026)

Last updated: 30 September 2026

> Quick Answer: For whole green moong dal, soak 1 cup 6 to 8 hours, then pressure cook with 3 cups of water for 4 to 5 whistles. Finish with a tadka of cumin, hing, ginger and tomato in mustard oil heated to a shimmer. It serves four with rice or roti.

In the pot, whole moong isn't just split moong with its skin on. The green seed coat slows water down, so it wants a longer soak, more water and more whistles than dhuli moong dal. Treat the two alike and the grains come out hard or burst.

Why mustard oil and not ghee for the tadka? Flavour. Kachi ghani oil brings a sharp, clean heat that cuts through the earthiness of the whole bean.

How long should whole moong soak?

Soak whole moong for 6 to 8 hours, or overnight, in about three times its volume of water. That softens the seed coat enough for even cooking. You can cook it unsoaked, but it takes longer, cooks less evenly and more skins split away from the grain.

Soaking works on any pulse, not just moong. A 2022 study in Heliyon found a 12 hour soak cut cooking time by 22.7% across eight bean varieties, from 109.5 to 84.6 minutes in tap water. Adding baking soda cut it further but made more beans break, which is why this recipe leaves soda out.

Drain, rinse once, and check the grains have roughly doubled in size.

How many whistles and how much water does whole moong need?

Use 1 cup of soaked whole moong to 3 cups of water, and cook for 4 to 5 whistles on medium heat, then let the pressure fall on its own. Unsoaked moong needs about 3.5 cups and 6 to 7 whistles. Cookers vary, so check the first batch.

These numbers are set for whole moong such as SatRas Haryana whole green moong, 900 g, where the skin stays on and the grain holds its shape. Split moong collapses in 2 to 3 whistles and needs less water. For the difference in the pot, see whole moong vs split moong.

One cup of dry whole moong weighs about 200 g and swells to roughly three times its dry weight once cooked, going by USDA's figures of 9.05 g water per 100 g dry and 72.66 g cooked. That makes four generous katoris.

How do you make green moong dal, step by step?

Pressure cook the soaked moong with turmeric and salt, then pour a mustard oil tadka over it and let it simmer for five minutes. Once the moong has soaked, it's about 35 minutes of active cooking, most of it waiting on the cooker. The ingredients below serve four.

Ingredients

• 1 cup (about 200 g) whole green moong, soaked 6 to 8 hours
• 3 cups water, plus a little for adjusting
• ½ tsp turmeric and salt to taste
• 2 tbsp mustard oil
• 1 tsp cumin seeds, a pinch of hing, 1 dried red chilli
• 1 onion, 1 tomato, 1 inch ginger and 3 cloves garlic, all chopped
• 1 tsp coriander powder, ½ tsp red chilli powder, fresh coriander

Method

1. Drain the soaked moong. Add it to the cooker with 3 cups of water, turmeric and salt.
2. Cook for 4 to 5 whistles on medium heat. Let the pressure release naturally.
3. Heat the mustard oil in a kadhai until it shimmers and the raw smell fades.
4. Add cumin, hing and the red chilli. When the cumin crackles, add onion and cook until golden.
5. Add ginger and garlic for a minute, then tomato and the powders. Cook until the oil separates.
6. Pour the cooked moong into the tadka. Simmer 5 minutes, mashing a few grains to thicken it.
7. Finish with fresh coriander and serve with rice or roti.

Why a mustard oil tadka, and when should it go in?

Mustard oil gives the dal a sharp, nose-tingling heat that ghee does not. Heat it until the surface shimmers and the raw smell softens, then add the spices before it smokes. A black mustard oil suits this best, because its pungency is the whole point of using it.

That pungency comes from allyl isothiocyanate. India's FSSAI oils and fats standard allows the kachi ghani and cold pressed labels only where natural allyl isothiocyanate is at least 0.20% by weight. Wood-pressed black mustard oil is the one to reach for here, at ₹304 for 1 L.

A smoke point of 250°C is commonly cited for mustard oil, including in a 2025 review in Frontiers in Nutrition, but you never need to go near it. A shimmer is enough; the page on mustard oil's smoke point explains why heavy smoke means the oil is breaking down.

Cost for the pot. At ₹279 for the 900 g pack, 200 g of moong comes to about ₹62, and 2 tbsp of black mustard oil about ₹9. Spices and vegetables aside, that is roughly ₹18 a serving across four.

How do you tell when whole moong is cooked through?

Press one grain between your thumb and finger. It should squash completely with no chalky centre, while most grains still hold their shape in the pot. If a few stay firm, add half a cup of hot water and give it one more whistle.

Burst, mushy grains mean too much water or one whistle too many, so drop one next time. Grains still hard after the full count usually mean old stock or a short soak.

Can whole moong dal be made without onion and garlic?

Yes. Leave both out and lean on hing, ginger, tomato and cumin, which is how many Jain and satvik kitchens make it. Add a little extra ginger and a squeeze of lemon at the end to lift the flavour. The mustard oil tadka carries enough pungency that the dal does not taste flat.

For a plainer everyday pot, skip the tomato as well and finish with only cumin, hing and dried red chilli in mustard oil. It's closer to a Punjabi sabut moong ki dal, and the green stays brighter.

What should you avoid when cooking whole moong?

Avoid cooking it like split dal, and avoid rushing the tadka. Most failed pots of whole moong come from too few whistles, too little water or smoking oil. The mistakes below cover most complaints about hard grains, burst skins and bitterness.

• Skipping the soak and then under-cooking; unsoaked moong needs 6 to 7 whistles.
• Adding baking soda to speed things up; it makes grains split and turn mushy.
• Smoking the mustard oil. A shimmer is enough; smoke turns the tadka bitter.
• Salting heavily before cooking old moong, which some cooks find slows softening.
• Draining the cooking water. It carries flavour and water-soluble nutrients into the dal.

ICMR-NIN's Dietary Guidelines for Indians 2024 make the same point on that last one: cook pulses in just enough water rather than pouring it away.

What can a recipe not tell you about your own cooker and moong?

It cannot account for your cooker's pressure, your flame or the age of your moong, and all three move the whistle count. Treat 4 to 5 whistles as the starting point for soaked whole moong, check the first batch, and note what worked for next time.

The dal is everyday food, not a remedy. This article is educational and is not medical advice; anyone on a prescribed or restricted diet should check portions and ingredients with a qualified doctor or registered dietitian.

Frequently asked questions

Can whole moong be cooked in an open pot instead of a cooker?

Yes. Use about 4 to 5 cups of water for 1 cup of soaked moong, with a lid partly on. Expect 40 to 50 minutes of simmering, topping up with hot water if it thickens too early. Stir now and then so it does not catch. The grains are ready when they squash easily and a few have started to break open.

Can leftover whole moong dal be stored and reheated?

Yes, for up to two to three days in a covered container in the fridge. It thickens as it cools, so add a splash of hot water when reheating and bring it back to a full boil. Cool it within an hour or two of cooking rather than leaving it out overnight. It also freezes well for about a month in portions.

Can yellow mustard oil be used for the tadka instead of black?

Yes. Yellow mustard oil is milder, so the tadka will be less sharp, which suits people new to mustard oil or children. Heat it to a shimmer in the same way before adding spices. If you want the classic sharp bite that suits sabut moong, black mustard oil gives more of it.

Should salt go in before or after pressure cooking?

Most cooks add it before, with the turmeric, so the grains season evenly. If your moong is old and tends to stay firm, add salt after cooking instead, since some cooks find salt slows softening in older pulses. Either way, taste and adjust once the tadka goes in.

What goes well with whole moong dal?

Plain steamed rice or jeera rice and phulkas are the usual pairings. A raw onion and lemon salad, a spoon of achaar and a plain curd raita round out the plate. The dal is thick enough to eat with roti on its own, and thinner versions pair better with rice.

Why does whole moong dal sometimes taste bitter?

Usually a burnt tadka or smoking oil, occasionally burnt garlic. Mustard oil heated past a shimmer and spices left too long both turn bitter quickly. Old, stale moong can also taste flat and slightly bitter. Heat the oil just until it shimmers, keep the flame medium, and add garlic after the onion, not before.