Overview
Corn chaat is among the simplest members of the chaat family. It consists of boiled kernels, or kernels cut from a grilled cob, mixed with a few fresh vegetables, lime juice and chaat masala. It needs no frying and no chutney-making, so it serves as a clear demonstration of how little is required for a plain ingredient to read as chaat: a sour note from lime and the savoury-sour spice blend are enough. Carts commonly sell it from large pots of boiled corn, and often beside grilled corn on the cob, the bhutta rubbed with butter and spice, at the same stall.
Because the technique is minimal, the corn itself matters more here than in almost any other recipe. Fresh sweet corn in season needs very little help. Corn that has been stored for some time tastes blander and starchier, and it benefits from a heavier hand with lime and chaat masala to compensate.
Where the Dish Comes From
Unlike pani puri or bhel puri, corn chaat carries no long or disputed founding tale. It is a practical, later arrival, which came as roadside carts spread through Indian cities in the twentieth century and gave the established lime and chaat masala treatment to an inexpensive, filling and easily obtained ingredient. It is sold across the country with little regional specificity, unlike dishes bound to a single city, although the exact vegetables and garnishes vary from one vendor and one household to the next.
Step-by-Step Method
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Prep
Cook the corn
Fresh cobs are boiled or steamed for about 8 to 10 minutes, until the kernels are tender, then cooled slightly and cut from the cob. Frozen kernels are boiled directly for 3 to 4 minutes, until tender. For a smokier result, whole cobs are grilled over a flame or on a hot grill and turned from time to time until they are lightly charred in places, after which the kernels are cut off.
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Prep
Mix the vegetables with the corn
In a bowl, the corn kernels are combined with the diced tomato, onion, cucumber if used, green chilli and coriander.
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Assemble
Season and toss
Lime juice, chaat masala, roasted cumin powder, chilli powder if used, and salt are added. Everything is tossed gently until coated evenly, and then tasted and corrected. The finished chaat should taste bright and sharp from the lime, and the savoury and sour notes of the chaat masala should come through clearly and not sit in the background.
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Serve
Garnish and serve at once
The chaat is moved to serving bowls or cups and topped with a sprinkle of sev for crunch, if desired. It is served immediately, because lime juice and salt keep drawing liquid out of the vegetables the longer the bowl stands, and the chaat turns watery.
Ingredient Swaps
The vegetables are flexible. Cucumber or tomato may be dropped or swapped depending on the pantry, and pomegranate seeds, cooked chickpeas or small squares of bell pepper are all established additions. A homemade stand-in for chaat masala combines roasted cumin, black salt and a little amchur, and it comes reasonably close. During mango season in the north, finely chopped raw mango frequently replaces some of the lime, giving a more pronounced sourness.
Turning the Heat Up or Down
Heat comes from the green chilli and the optional red chilli powder, and the two can be adjusted independently. Leaving out the green chilli altogether gives a chaat with tang and savoury depth but no real heat. Chaat masala is savoury and sour and not hot, so increasing it deepens the flavour without raising the heat to any significant degree.
Frequent Errors
Dressing the chaat too early is the most common mistake. Once the vegetables are salted and treated with lime, they release water fairly fast, and within 20 to 30 minutes a crisp, bright bowl becomes a watery one. Under-seasoning is the second. Corn chaat depends on a confident quantity of chaat masala and lime to taste like more than boiled corn with vegetables stirred in. Overcooking the corn is the third, particularly with frozen kernels, which turn mushy after a couple of minutes of boiling. They need only enough time to heat through and lose their raw bite. When cobs are grilled for a smokier version, the char should stay light and patchy, since heavy charring dries the kernels and costs the juiciness.
Keeping and Warming Leftovers
To keep: Preparation can be split: kernels and chopped vegetables are made up to a day early and chilled in separate containers, and the final mixing with lime and spice waits until just before the meal. Once dressed, the bowl is good for only 30 to 60 minutes. At a large gathering, the lime and spice can be set out on the side so that every guest dresses a portion, which keeps the vegetables crisp and allows each person to choose the level of sourness and seasoning.
To warm: No heat is applied to the finished chaat, which is a cool dish. Kernels cooked earlier and kept in the refrigerator may be warmed for a moment before they join the other ingredients, but the bowl itself is served cold.
Safe Handling
All fresh produce is washed thoroughly before chopping. Corn boiled in advance is cooled promptly and refrigerated and is not left at room temperature for long before use. Once the chaat has been assembled with lime juice and fresh vegetables, it is handled like a fresh salad. It stays refrigerated if it will not be eaten immediately, and it is discarded if it has remained at room temperature for more than about two hours.