Fast-food chains used to (in the 1950s and 1960s) built their menus around predictability. McDonald's and Restaurant Brands
International's Burger King literally started by making sure each restaurant offered the same experience no matter where you might be eating
At first, that led to innovations like offering fish sandwiches, and later the fairly revolutionary 1983 launch of the McDonald's Chicken McNugget
After that, the rules were essentially gone and consumers got a lot of odd experiments. Remember McPizza and McSpaghetti (it's better if you don't).
Many fast-food innovations failed spectacularly like the never-ending efforts of both McDonald's and Burger King to create a premium burger
The good news is that big chains like McDonald's, Burger King, and Yum! Brands KFC, Pizza Hut, and Taco Bell have the world to experiment on
The lasagna-like deep-dish mess made famous in Chicago. That makes it a bit odd that Pizza Hut has intro San Francisco-style pizza in its locations in India.
Pizza Hut uses sourdough crust on its unique pizza which it has offered on and off around the world for a few years
Sourdough crust appears to be a Pizza Hut thing as there is actually a style of pizza San Francisco is known for, according to Slice Life
It is comprised of a basic, thin crust and just about anything else, so long as it is sustainably grown and locally sourced
In the United States, McDonald's only tried bone-in chicken once with its failed Mighty Wings chicken wings. In India
The fast-food giant has been directly taking on KFC with bone-in fried chicken including a spicy version
Try bone-in chicken in its home market, it may bring another of its India menu innovations to the U.S. The chain has a line of "McSpicy" products
Likely to bring its India menu staple, the Bryani Bucket, to the U.S. That offering includes "Hyderabadi style Biryani rice," along with spicy gravy
Most Bryani buckets come with fried chicken, but the chain also offers a version for vegetarians that comes with a fried "Veg Patty