Chaina Ram Sweet Shop in Chandni Chowk, Delhi is located just outside the Fatehpur Masjid. It is one of the oldest sweets shop selling varieties of North-Indian sweets popular across the city. Karachi halwa, Malai Ghewar - made with fresh malai is most likely recommended. It also serves different types of North-Indian fares like kachori-sabji, poori-chole and many more.
For more locally-recommended eateries in Delhi, check out the posts below.
The Most Famous Food In Chandni Chowk, Old Delhi
The Jama Masjid Kebab Trail (Chandni Chowk, Delhi)