Chandni Chowk's food economy predates the British Raj by a century. Shah Jahan laid out the crescent-shaped market in 1650 as the ceremonial avenue linking the Red Fort to Fatehpuri Mosque, and within decades the corridor became the Mughal capital's primary wholesale and retail artery. By the 18th century, karigars and halwais had claimed the narrow galis branching off the main boulevard, establishing multi-generation establishments that still operate from the same stone-and-timber shopfronts their ancestors built. Paranthe Wali Gali earned its name from the frying pans that have hissed there since 1872. Ghantewala, founded in 1790, held the title of Delhi's oldest halwai until its closure in 2015, but its recipes migrated to a dozen neighboring shops. The culinary density is unmatched: a 400-meter stretch between Fatehpuri Mosque and the Sis Ganj Gurdwara packs 87 active food vendors, from seated restaurants to handcart operations. An Old Delhi street food tour navigates this density with purpose. Guides steer visitors past tourist-trap imitators toward third- and fourth-generation specialists—the chaat-wallah whose great-grandfather invented the meethi chutney variation now standard across North India, the jalebiwala who still fries in pure desi ghee rather than cheaper oils. The difference is legible on the plate: papdis stay crisp under yogurt for five minutes instead of disintegrating immediately, and the kulfi carries the granular texture that only slow-frozen milk produces. Most operators pair tastings with cycle-rickshaw transport, threading the web of galis too narrow for motorized vehicles. Evening departures capture the post-sunset surge when locals claim the lanes and vendors roll out specialties absent during daylight hours. The architecture frames the food. Havelis built by Mughal courtiers and later adapted by Marwari merchants rise four stories above the bazaar, their jharokha balconies and stucco façades weathered but intact. The Jain Lal Mandir's red sandstone marks the eastern anchor; the 17th-century Town Hall designed by British engineer Robert Tor Russell presides over the western terminus. Between them, the overhead electrical grid and modern signage cannot fully obscure the Shahjahanabad street plan—orthogonal lanes intersecting the main artery at precise intervals, a geometry visible from any rooftop vantage point. Chandni Chowk remains Delhi's commercial heart not as metaphor but as fact: wholesale spice traders still close deals worth lakhs of rupees in the same courtyards where their grandfathers negotiated, and the district's daily turnover rivals entire satellite cities.