The steak sandwich had been around since at least the 1800s, but in the early 1900s, a Philadelphia hot dog vendor topped it with cheese and used different bread to create the cheesesteak.

A chopped cheese sandwich is a New York culinary staple

The sandwich is a cross between a hamburger and a cheesesteak, featuring ground beef, cheese, and seasoning on a roll. Its fans add whatever other fixings they like, including lettuce, tomato, onions, mustard, and more.

From 'Yankee cheddar' to American cheese

From "Yankee cheddar" to Kraft Singles, American cheese has a long history shaped by innovation and economics. Originally a cheddar export, it evolved into the processed slices we know today—thanks to a 1916 patent. And in the 1980s, it became “government cheese,” distributed to millions.

Go inside the kitchen of the Michelin-recognized, Bib Gourmand-winning Philadelphia cheesesteak shop, Dalessandro's.

A New York farmer established the first cheese factory and revolutionized the industry by sourcing milk from local farms.

The frozen pizza was invented in 1950

In 1950, some pizzerias were premaking pies, allowing customers to take them home and cook them at their convenience. That same year, Philadelphia's Joseph Bucci filed a patent for a "Method of Making Frozen Pizza." Soon, frozen pizzas were appearing in grocery store aisles.

The phrase 'hot dog' likely evolved from the common name 'dachshund sausages,' a late-1800s slang term for sausages based on rumors that butchers were using substandard meat to make them.

Vegan cheesemaking relies heavily on nuts and seeds

We might associate vegan cheese with current health trends, but there’s actually been a small-but-growing market for plant-based cheeses since the 19th century. But for vegan cheeses to appeal to a wider demographic, they have to compete with the familiar flavors and textures of dairy cheeses.

Many artisan cheesemakers avoid modern methods

While much of the cheese found at the supermarket has been made in a factory, there are still plenty of artisan cheesemakers who do things the old-fashioned way. There is also a burgeoning vegan cheese market, which has quickly evolved from plasticky neon-orange shreds to Camembert-style soft cheeses made using traditional techniques.

Chicago deep-dish pizza arrived in 1943

Pizzeria Uno was the first establishment to sell the concoction, which turned more traditional pizza upside down, with cheese as the base and sauce as the topping. Soon, Uno employees went out on their own, sparking a citywide deep-dish phenomenon.

During Prohibition, Pabst Brewing Company switched from brewing its Blue Ribbon beer to making cheese.

The invention of cheese likely came from a fruit fly landing in a pail of fermenting milk

The chance encounter around 5,500 years ago laid the groundwork for cultured milk products like yogurt and cheese. Over time, microbes evolved in tandem with goats, sheep, and wheat to give us the wide variety of cheeses that we enjoy today.

Disco fries are New Jersey's answer to poutine

The dish—french fries topped with mozzarella cheese and brown gravy—is a staple for New Jersey diners, where the dish was served to inebriated patrons who'd just left the disco club. There's no clear inventor responsible for the delicacy, though most people assume it's a variation of poutine, the similar dish that's popular in Canada.

White Castle helped propel fast food as a restaurant model

Diners looking for quick meals had plenty of options with food stands and automats, but White Castle pioneered the concept of the fast food restaurant with its first location in 1921 in Wichita, Kansas. The owners emphasized White Castle as more than a fast and cheap way to eat; it was a place to sit and enjoy a meal, with stainless steel interiors and open kitchens.

Ancient Romans helped develop modern cheese production techniques

The ancient Romans loved cheese and experimented with different processes to elevate its flavor, like aging. Some of their innovations, like Pecorino Romano, you can still find today. Others, like the smoked goat-milk Caseus, we only know about through historical records.

Brazil is leading a cheese revolution and challenging European dominance in the industry

Brazil has plenty of traditional dishes that rely on cheese, but it’s only in the last decade that the country has emerged as a powerhouse in artisanal cheesemaking. While the cheeses may be inspired by European traditions, options like cocoa-dusted goat cheese or an Amazonian buffalo cheese are pure South American.

Globalization is increasing the demand for cheese

The increased popularity of Western cuisine has affected the cheese market in historically cheese-averse regions like East Asia. Japan has gotten particularly excited about exploring what cheese has to offer, with festivals and creative fusion dishes featuring the versatile ingredient.

Cheese is a less-well-known Hanukkah culinary tradition

It comes from a story of Judith, a widow whose hometown of Bethulia in Israel was seized by the Assyrian king Nebuchadnezzar. In some iterations, Judith brought the king's general, Holofernes, an array of salty snacks, including cheese, leading him to drink enough wine to pass out. Judith then beheaded Holofernes, inspiring the Israelites to attack and win the battle.

The food processing techniques developed for World War II, later repurposed for consumers

Research projects funded or sponsored by the military led to the development of active dry yeast to make bread easier to bake and an improved version of dehydrated cheese, which would be used in powdered cheese snacks. Freeze-drying, which had been used to ease the transport of blood plasma to battlefields, where it would be reconstituted with water, was later used on fruit for cereals.

Why beefsteak tomatoes are named after a meaty dish

No, they won't get vegetarians into trouble, but beefsteak tomatoes did earn their name because of their meaty texture. People also associate the hearty beefsteak with sandwiches and burgers because they make for a perfect topping on meat-centric dishes. This quick explainer breaks down the basic etymology of the beefsteak and provides a few helpful ideas for using the tomato in your next meal.

Pizza didn't take off in the US until after World War II, likely because of technological advancements and soldiers' exposure to it abroad.

Shake Shack began as a hot dog cart in Madison Square Park

The high-growth restaurant chain is one of the industry's biggest success stories. With chef Danny Meyer at the helm, the restaurant arose out of chance amid an effort to rehabilitate New York's Madison Park. Learn more of the restaurant's story here.

The legend of Pittsburgh’s fake Burger King

Years ago, a Burger King in Pittsburgh lost its franchise due to repeated customer complaints about food quality. However, the franchise-holders continued to operate the restaurant, switching to generic packaging but keeping the signage and uniforms. Customers eventually caught on and raised suspicions, leading to Burger King's corporate leaders' involvement. Learn more about the bizarre establishment and how it managed to continue operations for months.

One baker is likely responsible for several of New York's earliest pizzerias

Filippo Milone established at least six pizzerias in New York, including one that would later be called Lombardi's, widely considered to be the city's (and the country's) first pizza establishment. Milone died in 1924, leaving no children to tell his story. Researcher Peter Regas unearthed a 1903 advertisement, pictured below, from an Italian-language New York newspaper.

The Mister Softee ice cream truck began with two brothers in a Chevy van in Philadelphia, selling green ice cream.

Philadelphia's Cornbread claims to be the first modern graffiti artist

Darryl McCray began writing his nickname, "Cornbread," across his hometown of Philadelphia in the 1960s. That style was a way of posting a personalized signature across neighborhoods and would become known as "tagging." In time, that style spread to New York, where it took off among other young people.

A Connecticut man claims he invented the wrap

Bobby Valentine, a Connecticut-based restaurateur, claims that the burrito-inspired item was invented because someone requested a club sandwich on a day when his toaster was broken. Improvising, Valentine threw all the ingredients into a tortilla and put it on a $4 grill.

Some people in Italy enjoy a cheese with live maggots in it

From squeaky Wisconsin cheese curds to the squirmy Sardinian casu marzu, cheese around the globe comes in myriad forms. Exploring the work of seven cheesemakers in seven countries, this video shows each cheese has traditions and flavors unique to its part of the world.

Microbes are essential to creating the many varieties of cheese, influencing texture and taste

Microbes break down proteins and fats and produce compounds with distinct tastes. These microbes can include bacteria (like the one used to give Swiss its trademark holes), molds (like the ones that give blue cheese its distinctive veining), and countless other tiny organisms.

Delmonico's was the first American fine-dining restaurant

The steakhouse opened in 1837 in Manhattan, creating what is now considered the first fine-dining restaurant in the United States, introducing gloved waiters, white tablecloths, and an à la carte menu. The establishment also claims it invented a few American staples, including eggs Benedict, which was supposedly named after two loyal customers.

The story of pizza in the United States

Pizza is a big deal in the US, and it has many proud regional iterations. From Chicago deep dish to New York thin crust, this video takes a slice out of US history to focus on this beloved entree. Begin with the documented first incidence of pizza in the US—believed to be by Gennaro Lombardi—and end with how old Pizza Huts are being converted around the country.

Ballpark nachos—the messy but delicious combo of liquid cheese, pickled jalapenos, and tortilla chips—were invented for the Texas Rangers.

The world's most unique cheeses

Some are set apart by their unusual ingredients, like moose milk or live mites. Others are defined by texture, like the Georgian specialty tenili, a very rare hand-pulled cheese that resembles yarn or pasta strands. There’s even a canned cheese that has been using the same strain of bacteria for more than 70 years.

Uncrustables' reinvention of the PB&J

In the 1990s, David Geske and Len Kretchman came up with the ingenious idea to package and mass-produce a crustless version of the peanut butter and jelly sandwich. This makeover to an American childhood staple resulted in a $1B business. Read this article in Mental Floss to learn more about the origins of the brand Uncrustables and its extraordinary success.

What Americans ate after WWII

Returning from World War II, the American cultural landscape saw a vast number of changes. Cuisine, in particular, diversified and modernized thanks to traveled soldiers and wartime innovation. From inventions like powdered cheese to the popularization of instant coffee and Chinese food, explore the changes to the American food industry that continue to influence what we consume today.

Animals' stomach lining produces cheese

Cheesemaking would be impossible without rennet, the enzyme that separates milk’s liquid and solid components. Rennet occurs naturally in the stomach lining of young goats, cows, and lambs to help them digest milk, a process that also allows cheesemakers to use it to make curds. Now we have plant-based rennet that comes from thistles, artichokes, and other similar plants.

The unexpected return of the steakhouse

Although the 2010s and early 2020s saw fewer people eating red meat, the momentum has now swung in the opposite direction, with vegetarian spots closing and hip new restaurants slinging beef. Food writer Bettina Makalintal makes sense of the sudden shift by unpacking the steakhouse's resurgence.

Lombardi's was the first documented pizza restaurant in the US

The New York establishment opened in the early 1900s and was a cornerstone of Manhattan's SoHo. At one point, it was open 23 hours a day, allowing laborers of the predominantly Italian-American community to stop by for pies before or after work.

Detroit-style pizza's recipe nods to the Motor City

Legend has it that the rectangular pies were originally baked in blue steel pans intended to hold nuts and bolts in auto factories. The sauce poured across the top of the pies, meanwhile, is done so in straight lines called "tire tracks."

Pizza became more popular in Italy after it took off in the US

Pizza was invented in Naples, though it wasn't particularly popular outside the region. As it grew more popular elsewhere—and as more American and European tourists visiting Italy began asking for it—restaurants across Italy adopted the cuisine. It's something anthropologist Agehananda Bharati calls "the pizza effect."

Cookie Monster evolved from the Wheel Stealer, a monster obsessed with a wheel-shaped cheese snack.

Legend has it that the Margherita pizza was named after an encounter with Queen Margherita

The Queen of Italy, Margherita of Savoy, visited Naples in 1889. As the story goes, chef Raffaele Esposito of Pizzeria Brandi made her a pizza with basil, mozzarella, and tomato, to represent the colors of the Italian flag, and eventually named the pie in her honor. Historians, however, note that the facts don't line up: The proof of her visit to the pizzeria is suspected to be a forgery created when the business was in dire straits in the 1930s.

In 1694, a Sicilian in Paris opened the first gelateria, a precursor to the ice cream parlor.

Watch a recreation of the 'Speedee Service System,' the assembly line production method pioneered by the McDonald brothers that revolutionized fast food in the US.

Texas' includes German, Mexican, and Polish influences

Beef brisket, served with white bread and pickles, and sausage—a holdover from German immigration in the 1800s—are two of the most popular dishes. The southern end of the state brings together Mexican barbacoa and fajitas.

There are 6 essential steps in cheesemaking

The six basic steps that are required to turn milk into cheese start with acidification and end with ripening (aka aging). This guide explains what happens at each step and how it contributes to the finished product.

Taste 15 of the best sandwiches across the US

It's entirely feasible to enjoy a sandwich at every mealtime. You might kick off your day with a breakfast sandwich featuring fluffy eggs and cheese on a kaiser roll, savor a po'boy filled with crispy shrimp and hot sauce for lunch, and wrap up your...

Pizza is believed to have been invented in Naples

Flatbreads were eaten by ancient Egyptians, Romans, and Greeks, but historians trace pizza—flatbread with toppings, including present-day staples like tomatoes, cheese, garlic, oregano, and oil—back to 18th-century Naples, where the food was loved by its working poor, who appreciated a cheap, tasty meal. Naples formally became a part of Italy in 1861.

Italian immigrants brought pizza to Argentina in the late 19th century

Two million Italians emigrated to Argentina between 1880 and 1920, many of them the poor who regularly ate pizza. In Argentina, they were pleased to find that mozzarella was plentiful, allowing them to make cheesier pies. By 1882, Italians owned 126 of the 198 bakeries in Buenos Aires, as well as the majority of shops selling butter, cheese, and pasta.

Historians believe the first modern restaurant was opened in 1765

A Parisian soup salesman named Boulanger is often credited with opening the first modern restaurant and was renowned for serving meat in poulette sauce.

The same mold behind penicillin also flavors blue cheese

There are over 300 species of Penicillium. The mold that produces the lifesaving antibiotic is a close relative to those used to make blue cheeses like Roquefort and Stilton and to flavor some types of ham.