St. Louis-style pizza has a cracker-thin, unleavened crust topped with Provel, a processed cheese unique to the city, and is cut into squares known as the tavern cut.
The style took shape in the city's Italian and tavern kitchens in the mid-20th century, but it was Imo's, founded in 1964 on The Hill, that made it the regional standard. Its defining feature is Provel, a processed blend of cheddar, Swiss and provolone with a low melting point, gooey and buttery rather than stringy. Locals are fiercely divided on Provel, but the cracker crust cut in squares is the version St. Louisans grew up on and order by the dozen.
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