The Mysore Masala Dosa is a dosa spread with a red chutney and then filled with potato masala, a Karnataka version of the masala dosa built to run hotter than the plain one. The angle is that red chili layer painted directly onto the inside of the crepe: it adds a fiery, garlicky undercoat that the standard masala dosa does not have, so the heat is baked into the structure rather than served on the side. It comes off a hot griddle, folded and plated warm, eaten by hand by tearing pieces and dipping them into the accompaniments.
The build is sequential and the order matters. A fermented rice-and-lentil batter is poured onto a hot tava and spread thin into a wide, lacy circle, oiled or buttered at the edges so it crisps. While it is still on the griddle, a thick red chutney, ground from dried red chilies with garlic, soaked lentils and a little tamarind, is smeared across the cooking surface of the dosa. Onto that goes the potato masala: boiled potato broken down with onion, mustard seeds, curry leaves, turmeric and green chili into a soft, golden mound. The dosa is folded over the filling and slid off, served with coconut chutney and sambar. Good execution shows in a dosa that is thin and crisp with a clean snap, a red chutney that is genuinely pungent and evenly spread to the edges rather than a faint pink streak, and a potato masala that is well-seasoned and soft, not gluey or bland. Sloppy versions deliver a thick doughy crepe, a timid chutney layer that loses the entire point, or a watery, under-spiced filling that slumps out the side.
Variation runs along crispness, heat, and butter. A butter-cooked version eats richer and shatters more; a thinner, drier griddling makes it lacier and lighter. The intensity of the red chutney is the main lever, more chili and garlic for a sharper, hotter dosa, less for a gentler one. The defining difference from the plain masala dosa is exactly that chili undercoat: same crepe, same potato filling, but a built-in layer of heat. The closely related thin, crisp lentil crepe served without filling, the plain dosa, deserves its own article rather than being crowded in here. What marks the Mysore version is order and intent: chutney first, masala second, so every bite carries the chili through the potato and the crisp.