Burgers of the World
Germany fried its meat patties in a skillet and Japan served them with a glossy sauce. America put one on bread and argued for a century over who did it first. Here is every style, step by step, cooked to a safe 160ยฐF.

German Frikadellen (Hamburg-Style Meat Patties)
Germany's pan-fried meat patties, made with half beef and half pork, a stale roll soaked in milk, sweated onion and parsley, then fried slowly to a deep brown crust and served with mustard.

Japanese Hambagu (Hamburg Steak with Red Wine Sauce)
Tender oval patties of beef and pork bound with panko, milk and sautรฉed onion, steamed in red wine and finished with a glossy pan sauce of butter, ketchup and tonkatsu sauce.

The Louis' Lunch Hamburger on Toast (New Haven)
A square patty of ground chuck and sirloin with an onion slice pressed into it, cooked over a hot fire and served the New Haven way: between two slices of white toast with tomato, onion and a sharp cheese sauce, and no ketchup.

The Classic Backyard Grilled Cheeseburger
Thick, juicy patties of 85 percent lean beef with a dent in the center so they grill flat, topped with American cheese and stacked on soft buns with lettuce, tomato, onion, pickles, ketchup and mustard.

The Smash Burger
Two small balls of beef chuck smashed paper-thin onto a screaming-hot pan, scraped up with every bit of brown crust, and stacked with a slice of American cheese melting between them.

The Oklahoma Fried Onion Burger
A small ball of beef smashed thin on a hot skillet with a mound of paper-thin onions pressed into it, flipped so the onions fry and caramelize, then topped with American cheese and a bun steamed right over the onions.

The Juicy Lucy (Minneapolis Cheese-Stuffed Burger)
Two thin beef patties sealed around rounds of American cheese, seared in a cast-iron skillet until the cheese inside turns molten, and served on a potato roll with buttery onions and pickles.

The Wisconsin Butter Burger
Lean ground sirloin enriched with cold butter seasoned with a little soy sauce, seared in a hot skillet and topped with a thick pat of the same butter and a spoonful of soft stewed onions, so the butter melts down into the bun.

The New Mexico Green Chile Cheeseburger
Thick ground-chuck burgers grilled over a two-level fire, topped with melted cheese and a heap of freshly roasted, peeled and chopped New Mexico green chiles, on soft buns with tomato and lettuce.

The Australian Burger with the Lot
A seasoned beef patty with onion, garlic and parsley, piled into a toasted roll with barbecue sauce, lettuce, cheese, canned beetroot, a pineapple ring, tomato, a fried egg, bacon and red onion.

Vada Pav (Mumbai's Potato Fritter "Burger")
A spiced mashed potato patty dipped in chickpea batter and deep-fried, tucked into a soft white roll with green chutney and a crunchy dry garlic, coconut and peanut chutney.

30-Minute Weeknight Skillet Burgers with Onions and Horseradish Sauce
Garlicky burgers seared in one skillet, then onions browned in the drippings, with a quick sour cream and horseradish sauce, on the table in 30 minutes with no grill.

Double-Double Style Burger, Animal Style, Inspired by In-N-Out
Inspired by, not official: two thin mustard-seared patties with American cheese, deeply caramelized onions, pickles, tomato, lettuce and a pink Thousand Island-style spread on a toasted bun.