Butter Naan is the North Indian tandoor flatbread finished simply: a naan brushed with butter as soon as it comes off the heat. It is the default bread on countless restaurant tables, and its appeal is uncomplicated, a soft chewy flatbread made richer and glossier by fat melting into a hot surface. With nothing stuffed or layered in, the quality of the bread and the timing of the butter are the whole story.
The dough is leavened, soft, and slightly elastic, traditionally slapped onto the wall of a tandoor and baked fast at high heat so it puffs, bubbles, and chars in dark spots while staying pliable. The moment it is pulled, while still hot, it is brushed with butter so the fat melts into the surface and softens the crust. Good execution shows in the bread: a tender, slightly chewy crumb with airy pockets, a thin crisp-charred exterior, and that distinct smoky note from the high heat. The butter should go on hot and even, absorbed into a glossy finish rather than sitting as a cold slick on a cooled bread. Sloppy versions are baked at too low a heat so they come out pale, dense, and bready with no char; left to sit so they stiffen before the butter goes on; or finished with so much fat on an already-greasy bread that it turns slick and heavy instead of enriched.
The variations split off into their own breads. Garlic naan worked through with chopped garlic, stuffed versions filled with paneer or spiced potato, and the unleavened griddle-baked kulcha and roti are distinct enough that each deserves its own article rather than being crowded in here. Within plain butter naan the only real levers are a sprinkle of nigella seed or chopped coriander pressed onto the dough before baking, and how heavy the final brush of butter is. Its purpose at the table is to tear and scoop, so it is judged partly on whether it stays soft and foldable rather than cracking. A good butter naan is charred, airy, and soft with a real glossy coat of butter melted in; a poor one is a pale dense disc with a cold greasy film on top.