If you’ve never been to St. Louis, there’s a good chance you’ve never encountered this pizza. And if you have encountered it — perhaps at a chain restaurant, or at a party where someone from Missouri brought a box — there’s also a chance your first reaction was: wait, is this actually pizza?

The cracker-thin crust. The gooey, almost ethereal cheese that melts into a uniform creamy pool. The sauce that’s noticeably sweeter than anything coming out of Naples. And the squares. Always the squares.

St. Louis style pizza is one of America’s great regional pie traditions — and one of its most misunderstood. It’s not trying to be New York pizza. It’s not competing with deep dish. It’s doing its own thing, confidently, in the shadow of the Gateway Arch, and it’s been doing it since before you were born. Here’s everything you need to know — plus a full recipe to make it at home.

Save or share this infographic — everything you need to know about St. Louis Style Pizza at a glance.

What Is St. Louis Style Pizza?

St. Louis style pizza is a distinctly Midwestern take on pizza that developed in and around St. Louis, Missouri from the mid-20th century onward. It has three defining characteristics that set it apart from every other regional style in America:

• A thin, unleavened, cracker-like crust — made without yeast, rolled rather than stretched
• Provel cheese — a processed blend of cheddar, Swiss, and provolone with a famously low melting point
• Sweet tomato sauce — noticeably sweeter than Italian-American pizza sauces, with heavy oregano seasoning

The pizza is cut into squares (sometimes called a “party cut” or “tavern cut”), never wedges. This isn’t just an aesthetic choice — because the crust is so thin and brittle, triangular slices would likely fall apart under the weight of the toppings.

If you’re new to thinking about pizza styles across the US, St. Louis is the deep end of the pool. It challenges just about every assumption about what pizza is supposed to look, taste, and feel like — which is exactly what makes it so fascinating.

The Real Story Behind Provel Cheese

Provel is the reason this pizza exists, and also the reason half the internet argues about whether it counts as real pizza. Let’s settle what we actually know.

According to food historians and the documented history of the cheese, Provel was developed in the 1940s by Costa Grocery (now Roma Grocery on the Hill) in St. Louis, in collaboration with Hoffman Dairy of Wisconsin. The goal was practical: pizza makers wanted a cheese that melted cleanly at lower temperatures, broke off neatly when bitten or sliced, and didn’t create the elastic mozzarella-pull that can take the entire top layer off a hot pie in one grab.

They got exactly what they asked for. Provel is a processed cheese — meaning it’s manufactured by blending cheddar, Swiss, and provolone with emulsifying salts and a touch of liquid smoke. The result is a white, semi-soft cheese that melts like butter at relatively low heat, spreads across the crust in a smooth, creamy layer, and firms up into a clean bite when cooled.

Provel is almost exclusively available in the St. Louis area — you’ll find it at Schnucks and Dierbergs Markets locally, and Imo’s Pizza sells shredded Provel directly. If you’re outside the region, the good news is that a DIY blend of equal parts white cheddar, Swiss, and provolone (with a drop or two of liquid smoke) gets you surprisingly close. The texture won’t be quite identical, but the flavor profile lands in the same neighbourhood.

The Three Pillars of St. Louis Style

1. The Cracker Crust

The defining textural feature of St. Louis pizza is that crunch. The crust is made without yeast — just flour, baking powder, oil, and water — and rolled to roughly 1/8 of an inch thick. At that thickness, rolled rather than hand-stretched, it bakes up almost like a savory flatbread cracker.

This is a very different baking challenge compared to traditional pizza dough. If you’re used to making conventional pizza dough with long fermentation for flavor development, this will feel almost backwards — there’s no rise time, no yeast activity to manage, and the whole thing comes together in about 10 minutes. The crust gets its character from the bake, not the bench.

All-purpose flour is the correct choice here. Don’t reach for bread flour or 00 flour — those develop gluten and chewiness, which is the opposite of what you want. You’re building a cracker, not a crust.

2. The Sweet Tomato Sauce

St. Louis style sauce leans distinctly sweeter than Italian-American pizza sauces. The influence comes from the large Sicilian immigrant community that settled in St. Louis in the early 20th century — Sicilian-American cooking tends toward a slightly sweeter tomato profile, and that tradition carried into the local pizza identity.

A classic St. Louis sauce recipe combines tomato sauce with tomato paste, dried oregano, dried basil, and a real amount of sugar — roughly a tablespoon per 8 oz of sauce. It shouldn’t taste like dessert, but it should taste noticeably sweeter than a Neapolitan or New York-style sauce. That sweetness is deliberate and it plays off the smoky, buttery Provel beautifully.

For your own version at home, our homemade pizza sauce guide gives you the foundation — just add more sugar and oregano than you normally would, and you’re heading in the right direction.

3. The Square Cut (Party Cut / Tavern Cut)

The square — or “party cut” — is non-negotiable. St. Louis pizza is always cut into 3-4 inch squares, which means depending on the size of the pie you end up with between 12 and 20 pieces. One popular origin story credits Imo’s founder Ed Imo’s background as a tile-layer for inspiring the grid pattern — whether or not that’s true, the cut has become part of the pizza’s DNA.

The practical case for the square cut is solid: a cracker-thin crust can’t support the structural weight of a full-length pizza wedge loaded with toppings. Smaller squares distribute that load sensibly, are easier to pick up and eat, and make the whole thing dramatically more party-friendly.

Imo’s Pizza and Why It Matters

You cannot talk about St. Louis style pizza without talking about Imo’s. Ed and Margie Imo opened their first pizza parlor on The Hill neighborhood in 1964. The original menu actually featured mozzarella — it was a new chef who introduced Provel to the kitchen, recognizing that its low melting point created exactly the smooth, creamy coating the thin crust needed.

As Imo’s grew into a regional chain with over 100 locations across Missouri, it became the engine that spread St. Louis style pizza — and Provel — to the masses. Imo’s eventually acquired Costa Grocery, the original distributor of Provel, giving them direct control over the cheese supply. Today, Imo’s sells shredded Provel directly to consumers in grocery stores, and the cheese is packaged and distributed throughout the greater St. Louis area.

St. Louis pizza has also started attracting serious attention outside Missouri. Atlas Obscura has featured it as one of America’s most distinctive regional foods, and it regularly appears on “regional pizza styles you need to try” lists alongside Detroit, New Haven, and Roman al taglio styles.

Full Recipe: St. Louis Style Pizza at Home

Whether you can get your hands on actual Provel or you’re going with the DIY blend, here’s a full recipe that nails every element of the authentic St. Louis experience. The crust comes together fast — no yeast, no waiting — and the whole pizza is done in under an hour.

Watch the full St. Louis Style Pizza process from crust to square cut.

Pro Tips for Getting It Right

St. Louis style is forgiving in some ways — no yeast means no timing stress — but it has its own set of landmines. These are the things that’ll save you from a soggy or burnt result.

One more thing worth knowing: St. Louis pizza is surprisingly good at room temperature. Unlike mozzarella-based pies that go rubbery when cooled, Provel stays soft and pleasant as it cools, making leftover squares an entirely respectable lunch option. (Don’t reheat them in the microwave — they’ll go soft. The oven or an air fryer brings the crunch back. Our guide on how to reheat pizza properly covers this.)

How St. Louis Style Fits Into the American Pizza Landscape

American pizza is a patchwork of regional traditions, and understanding the major styles helps you appreciate what each one is actually doing. St. Louis sits at a fascinating extreme on the spectrum.

If thin crust vs. thick crust is the primary pizza axis, St. Louis is about as far toward the thin end as you can go without it being a flatbread. It’s thinner than New York style, thinner than tavern cut, and considerably thinner than anything emerging from Chicago or Detroit. The absence of yeast is what makes that possible — yeast dough, even when thin, retains some puff; unleavened dough has nowhere to go but flat.

For a beginner exploring pizza styles at home, St. Louis is actually a fantastic starting point. No yeast management, no fermentation timing, no finicky dough stretching. Roll it thin, bake it twice, top it generously, cut it into squares. The whole experience is accessible and the payoff is high.

The Bottom Line

St. Louis style pizza isn’t trying to be anything it isn’t. It’s not competing with Neapolitan tradition or New York slice culture. It developed in its own city, for its own people, built around a cheese that was specifically engineered for the purpose and a crust technique that prioritizes crunch over everything else.

Is it divisive? Sure. The first time most people encounter Provel, their brain is busy comparing it to mozzarella and finding it lacking. But that’s the wrong comparison. Provel does what mozzarella simply can’t — it melts at low heat into a smooth, creamy, lightly smoky blanket that clings to a cracker crust without pulling it apart.

Give it a proper shot. Make the recipe above, cut it into squares, eat it with someone from Missouri watching — and try to keep a straight face when they say “told you so.” If you want to keep exploring American regional styles, check out our full guide to pizza styles for home cooks — there are more surprises in there than you’d expect.