The Deep Dish Pizza Origin Story: How Chicago Created an American Culinary Icon

The creation of Chicago deep dish pizza is a documented historical event with identified individuals, specific places, and a reasonably clear timeline — unusual for a food origin story in a category typically dominated by myth and competing claims.

The Founding Moment: Pizzeria Uno, 1943

The origin of Chicago deep dish is attributed to Ike Sewell and Ric Riccardo, business partners who opened Pizzeria Uno at 29 East Ohio Street in Chicago in 1943. The specific individual who developed the deep dish recipe — and how much was Sewell's idea versus a kitchen cook's contribution — has been debated with some intensity.

Adolpho "Rudy" Malnati, an early employee at Pizzeria Uno who later established his own pizza dynasty (his family eventually founded Lou Malnati's), has been credited by some historical accounts with significant influence over the deep dish recipe development. The Sewell family and Malnati family's competing narratives about the recipe's origin are a piece of Chicago food history folklore that both families have maintained publicly for decades.

What is not contested: by the late 1940s, Chicago deep dish was an established and popular restaurant category, with Pizzeria Uno as its founding institution.

The Design Decisions Behind Deep Dish

Understanding why deep dish was designed the way it was illuminates the style's character.

The deep pan was a deliberate choice to make pizza more substantial: Sewell reportedly believed that existing pizza was insufficient as a main meal for the hearty Midwestern appetite he was catering to. The deep pan format allowed dramatically more cheese, sauce, and filling than any thin-crust alternative — a design specifically intended to produce a filling, satisfying meal rather than a light snack.

The inverted architecture (cheese below sauce) was a practical solution to an engineering problem: high cheese quantities in a deep pan with a standard bake time required insulation from direct oven heat. The sauce as insulating layer emerged from the problem rather than from culinary preference.

The buttered pan was both practical (preventing sticking) and flavor-contributing (the butter fries the bottom of the dough, creating the characteristic tender-crispy base texture).

The Giordano's Innovation: Stuffed Pizza

Giordano's — opened in 1974 by the Boglio brothers, Italian immigrants from a pizza-making family in Torino — introduced the stuffed pizza variant: a second dough layer sealed over the cheese filling before sauce application. The result is a completely enclosed cheese filling that produces an even more extreme deep-dish experience.

Giordano's claims that their recipe is based on a traditional Italian Easter pie (torta pasqualina) brought from Italy by their family — a claim that connects American deep dish innovation to Italian culinary heritage in a way that the purely American Pizzeria Uno origin story doesn't.

Deep Dish's Complicated Relationship with Pizza Culture

Italian-Americans and pizza traditionalists have historically contested whether deep dish is "really pizza" — a debate that has produced memorable cultural moments including an infamous response from Chicago Mayor Rahm Emanuel to a New York-focused pizza ranking published by Jon Stewart.

The answer most useful for consumers: deep dish is a genuinely distinct food that happens to be categorized under the pizza umbrella. It shares dough, cheese, and tomato sauce with thin-crust pizza while being fundamentally different in construction, eating experience, and caloric profile. Approaching it as its own category rather than as a pizza variant produces more satisfaction.