Flame-roasted potato mash with mustard oil and raw onion — the most made Bihari side dish
Ingredients
- 4 large potatoes
- 1 small onion finely chopped
- 2 green chillies chopped
- 2 tbsp mustard oil
- Salt to taste
- Fresh coriander
- Lemon juice
Method
About Aloo Chokha: Aloo Chokha is the Bihari everyday side — roasted potato mash dressed with mustard oil and raw onion. Always served alongside litti (the iconic Bihari roasted dough balls), it forms half of the legendary "litti-chokha" combination that defines Bihari cuisine. Simple, rustic, and deeply flavourful, it represents Bihari home cooking at its most authentic.
Understand the chokha tradition: Bihari cuisine has three legendary chokhas — aloo (potato), baigan (eggplant, recipe id 1315), and tomato (recipe id 1316). All three are eaten with litti, and many Bihari families serve all three together at festive meals. Each chokha has a distinct character but shares the same rustic, fire-roasted spirit.
Choose floury potatoes: Use 4 large floury potatoes (russets, Maris Piper, or any floury variety). Floury potatoes mash properly into the rustic texture aloo chokha needs. Waxy potatoes (red potatoes, baby potatoes) stay too firm and will not mash to the right consistency.
The potato size: Each potato should be about 200-250g — large enough to roast through with a thick skin that chars without burning the flesh inside.
The critical fire-roasting: This is the dish's defining technique. Apply 1/2 tsp oil to each potato and rub all over the skin to keep the surface from drying out completely.
For gas flame: Place each potato directly on a medium gas flame, holding by skewering through the centre with a metal skewer. Turn every 3-4 minutes for 25-30 minutes total.
Watch the potato transform: As they roast, the skin will char and turn black in patches, the flesh inside softens dramatically. The potatoes are ready when the entire body has slightly collapsed and feels completely soft when squeezed gently with tongs (carefully — they are very hot).
For oven roasting (alternative): If you have no gas flame, place oiled potatoes on a baking tray. Roast at 220C for 50-60 minutes until soft. Finish under the broiler for 2-3 minutes per side for char marks. The result is good but lacks the depth of true open-flame char.
Why fire-roasting matters: The smoky char from open flame is what defines Bihari chokha. Boiled potatoes simply do not produce the right flavour profile — the dish requires the smoky character.
Let the potatoes cool: Transfer the roasted potatoes to a plate and cool for 10 minutes — they are too hot to handle straight off the heat.
Peel the potatoes: Once cool enough to handle, peel off all the charred black skin with your fingers — it pulls off easily. Discard the skin. Place the soft smoky flesh in a wide bowl.
The importance of leaving smoke flecks: Some small black flecks of charred skin will inevitably end up in the flesh. Do not pick them all out — the small flecks add to the smoky character.
Mash to rustic texture: Use a fork or potato masher to mash the smoky flesh roughly. The texture should be like rough mashed potato with some larger pieces still visible.
The critical rustic texture: Bihari aloo chokha is meant to be rustic — never smooth like Western mashed potato. Some pieces of potato should be visible. The texture variety is part of the appeal.
Prepare the onion: Take 1 small onion. Peel and chop into very fine 5mm dice. The onion goes in raw — its sharp pungency is the counterpoint to the smoky cooked potato.
Prepare the green chillies: Take 2 fresh green chillies. Finely chop. Adjust quantity to your heat tolerance.
Prepare the coriander: Take 2 tbsp fresh coriander leaves with their tender stems. Wash, shake dry and chop finely.
The critical raw mustard oil: Use 2 tbsp raw mustard oil. The Bihari aloo chokha tradition uses raw, not heated, mustard oil — the sharp pungency is essential. If you find raw mustard oil too sharp, briefly heat it in a small pan for 30 seconds until it just smokes, then cool completely before using.
Why raw oil matters: Raw mustard oil retains all its pungent compounds. Cooking these reduces the sharpness — fine for cooked dishes, but wrong for chokha. The raw aroma is what gives Bihari chokha its distinctive character.
Mix everything together: To the mashed smoky potato add the chopped raw onion, chopped green chillies, the 2 tbsp mustard oil, salt to taste (about 3/4 tsp), and 1 tsp lemon juice.
Mix gently with hands or spoon: Use clean hands to mix everything together — the warmth of your hand and the gentle pressure helps the flavours marry beautifully. The traditional Bihari way is by hand. If you prefer, use a flat wooden spoon and fold gently rather than stirring.
Keep the rustic texture: Mix just enough to combine — over-mixing turns the chokha into a smooth puree, losing the textural variety. Some larger pieces of potato should still be visible.
Taste and adjust: Dip a clean spoon and taste. The chokha should hit you with multiple flavours — soft smoky potato, sharp raw onion, gentle to fierce chilli heat, pungent mustard oil, bright lemon. Adjust salt or chilli to your liking. The flavour should be vivid and assertive.
Garnish: Sprinkle the chopped coriander over the top. For an extra Bihari touch, drizzle 1/2 tsp more raw mustard oil on top.
Serve at room temperature or warm: The traditional Bihari way is to serve aloo chokha just slightly warm — not piping hot, not cold. Room temperature is also acceptable.
The legendary litti-chokha pairing: Serve alongside hot litti (the wheat dough balls stuffed with sattu and roasted over fire). The litti and chokha together form the most iconic Bihari meal — eaten with hands, the warm litti dunked into the smoky cool chokha.
Serving as a side: Alongside any Bihari rice meal, aloo chokha is a beloved side dish. A small portion (about 1/4 cup per person) is plenty.
For a Bihari family meal: Serve aloo chokha alongside steamed rice, a dal, and one of the chokhas (baigan or tomato). The combination is the heart of Bihari home cooking.
A cultural note: Aloo chokha is one of the most universally beloved dishes in Bihar — every region, every family, every generation has its own slight variation. The dish symbolises rural Bihari cooking — using simple ingredients, transformed through the magic of fire and aromatic mustard oil. Eating it connects you to a tradition stretching back centuries.
Leftover storage: Stored in the fridge in an airtight container, aloo chokha keeps for 1-2 days. The smoky character fades slightly overnight but the dish is still delicious. Bring to room temperature before serving rather than reheating.