1Heat olive oil in a large skillet over medium-low heat.
2Heat olive oil in a large skillet over medium-low heat.
3Heat olive oil in a large skillet over medium-low heat.
4Add thinly sliced onions and a pinch of salt.
5Add thinly sliced onions and a pinch of salt.
6Add thinly sliced onions and a pinch of salt.
7Cook them slowly, stirring occasionally, for about 15-20 minutes until they turn a deep golden brown.
8Cook them slowly, stirring occasionally, for about 15-20 minutes until they turn a deep golden brown.
9Cook them slowly, stirring occasionally, for about 15-20 minutes until they turn a deep golden brown.
10Push the caramelized onions to one side of the pan and increase heat to medium-high.
11Push the caramelized onions to one side of the pan and increase heat to medium-high.
12Push the caramelized onions to one side of the pan and increase heat to medium-high.
13Add the ground beef, breaking it into small pieces with a wooden spoon.
14Add the ground beef, breaking it into small pieces with a wooden spoon.
15Add the ground beef, breaking it into small pieces with a wooden spoon.
16Cook until no pink remains, about 5-7 minutes.
17Cook until no pink remains, about 5-7 minutes.
18Cook until no pink remains, about 5-7 minutes.
19Stir in minced garlic and cook until fragrant, about 30 seconds.
20Stir in minced garlic and cook until fragrant, about 30 seconds.
21Stir in minced garlic and cook until fragrant, about 30 seconds.
22Add Worcestershire sauce, soy sauce, dried thyme, salt, and pepper.
23Add Worcestershire sauce, soy sauce, dried thyme, salt, and pepper.
24Add Worcestershire sauce, soy sauce, dried thyme, salt, and pepper.
25Mix the caramelized onions and beef together thoroughly.
26Mix the caramelized onions and beef together thoroughly.
27Mix the caramelized onions and beef together thoroughly.
28Reduce heat to medium-low and let the mixture simmer for 5-7 minutes, allowing the flavors to meld.
29Reduce heat to medium-low and let the mixture simmer for 5-7 minutes, allowing the flavors to meld.
30Reduce heat to medium-low and let the mixture simmer for 5-7 minutes, allowing the flavors to meld.
31Lightly toast the hamburger buns until golden.
32Lightly toast the hamburger buns until golden.
33Lightly toast the hamburger buns until golden.
34Spoon the beef mixture generously onto the bottom halves of the toasted buns.
35Spoon the beef mixture generously onto the bottom halves of the toasted buns.
36Spoon the beef mixture generously onto the bottom halves of the toasted buns.
37Top with shredded Swiss cheese while the mixture is still hot, allowing it to melt slightly from the residual heat.
38Top with shredded Swiss cheese while the mixture is still hot, allowing it to melt slightly from the residual heat.
39Top with shredded Swiss cheese while the mixture is still hot, allowing it to melt slightly from the residual heat.
40Place the assembled sandwiches under the broiler for 1-2 minutes, just until the cheese gets bubbly and begins to brown at the edges.
41Place the assembled sandwiches under the broiler for 1-2 minutes, just until the cheese gets bubbly and begins to brown at the edges.
42Place the assembled sandwiches under the broiler for 1-2 minutes, just until the cheese gets bubbly and begins to brown at the edges.
43Sprinkle with freshly chopped parsley for color and freshness.
44Sprinkle with freshly chopped parsley for color and freshness.
45Sprinkle with freshly chopped parsley for color and freshness.
46Place the top bun on and serve immediately while still warm and gooey.
47Place the top bun on and serve immediately while still warm and gooey.
48Place the top bun on and serve immediately while still warm and gooey.
Ingredients
pound ground beef (85% lean)
pound ground beef (85% lean)
pound ground beef (85% lean)
large onion, thinly sliced
large onion, thinly sliced
large onion, thinly sliced
2 cloves garlic, minced
2 cloves garlic, minced
2 cloves garlic, minced
tablespoon olive oil
tablespoon olive oil
tablespoon olive oil
teaspoon Worcestershire sauce
teaspoon Worcestershire sauce
teaspoon Worcestershire sauce
teaspoon soy sauce
teaspoon soy sauce
teaspoon soy sauce
teaspoon dried thyme
teaspoon dried thyme
teaspoon dried thyme
to taste Salt and pepper
to taste Salt and pepper
to taste Salt and pepper
4 hamburger buns (preferably brioche)
4 hamburger buns (preferably brioche)
4 hamburger buns (preferably brioche)
cup shredded Swiss cheese
cup shredded Swiss cheese
cup shredded Swiss cheese
Fresh parsley, chopped (for garnish)
Fresh parsley, chopped (for garnish)
Fresh parsley, chopped (for garnish)
Equipment
large skilletwooden spoon
Tips
The secret to perfect caramelized onions is patience – resist the urge to increase the heat. Low and slow creates that melt-in-your-mouth sweetness.
For maximum flavor, deglaze the pan with a splash of beef broth after cooking the meat. Scrape up those browned bits from the bottom – they’re concentrated flavor bombs!
Always toast the buns face-down in the same pan after removing the meat mixture. They pick up those savory bits left behind, adding another layer of flavor.
When choosing ground beef, look for freshly ground from the butcher counter. The texture and flavor difference is noticeable compared to pre-packaged options.
For an extra layer of authentic French onion flavor, sometimes add a teaspoon of beef bouillon paste to the mixture. It amplifies the savory notes beautifully.