Arcot biryani comes from the Arcot region in northern Tamil Nadu, just west of Chennai, and was the original Nawab-of-Arcot court biryani — the same Nawab who later gave his name to Ambur biryani thirty kilometers down the road. The Arcot Nawabs were Persian-descended rulers installed by the Mughals to govern the Carnatic; their kitchens drew Mughal, Persian, and Tamil Muslim influences together. Modern Arcot biryani is a quieter cousin of Ambur — same rice, lighter spicing, no aggressive chili. It is a dying style today, kept alive by a handful of family kitchens in Arcot town itself and a few migrants who carried the recipe to Chennai and Tirupati. Recognizing Arcot biryani is hard because so few places serve it commercially. Look for these markers: seeraga samba rice (same as Ambur), but a paler color from less chili; a milder masala that lets the goat-meat flavor stand on its own; cardamom and clove are forward, but kalpasi and pepper are restrained. The portion sizes tend to be small — single-pot home-cooking proportions rather than commercial-kitchen mountains. Pair with a thin onion-tomato curry and lime pickle. In the US, you will almost never see Arcot biryani on a menu by name — your best bet is asking at Tamil-Muslim-owned restaurants whether the chef knows the style. The closest commercial equivalent is a milder Ambur. If you're ever in the actual town of Arcot, the small biryani houses near the dargah are still cooking the real thing.