The world's wealthiest individual (the 7th Nizam) ran the most elaborate court kitchen in India. When the court dispersed in 1948, the cooks opened restaurants. The biryani, the haleem, the Irani cafe — the Nizam's table is still serving.
Hyderabad's food culture is a direct inheritance from the Nizam's court — the 36-course banquet tradition of the most elaborate court kitchen in India, dispersed into the restaurant culture when the state was integrated into India in 1948. The specific Hyderabadi biryani, the haleem that became a Ramadan institution, and the Irani cafes brought by Persian migrants to the Nizam's employment are all still operating in recognisable form.

The Hyderabadi biryani is now arguably the most commercially successful biryani format internationally — the kachchi method (raw marinated meat cooked simultaneously with rice under dum), the specific Hyderabadi masala (which includes kalpasi, stone flower, and other specific ingredients), and the Basmati rice combination are widely recognised globally. The specific colour (from saffron and fried onions) and the specific proportion of meat to rice (more meat than most biryanis) are the visual and gustative signatures of the Hyderabadi format.
Paradise Restaurant in Secunderabad, established in 1953 by Mohammad Maqdoom (a former royal court cook), was among the first restaurants to commercialise the court biryani tradition. The format — kachchi dum biryani, served in specific quantities, with mirchi ka salan and raita — became the template for Hyderabadi biryani restaurants nationally and internationally. Paradise did not invent Hyderabadi biryani — the Nizam's court did. But Paradise systematised it for commercial service and established the format that 10,000 restaurants now replicate.

Hyderabad's restaurant culture is divided between the old Irani cafes and biryani restaurants of the old city and the new technology-economy restaurants of HITEC City. The old city (Charminar area) contains the most historically continuous restaurant food in Hyderabad; the HITEC City area reflects the city's transformation into India's second technology hub.
The Hyderabadi diaspora in the Gulf (particularly in Dubai and Riyadh), the US (particularly in New Jersey and Houston), and the UK has taken the Hyderabadi biryani format internationally. The biryani is now the most commercially available Indian rice preparation internationally.