French Onion Cheeseburgers
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Unrated
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Prep Time
15 mins
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Cook Time
15 mins
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Total Time
1 hr
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Servings
4
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Course
Main Course
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Cuisine
American
French Onion Cheeseburgers
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Soup heaven meets burger heaven in these French Onion Cheeseburgers. They taste just like French onion soup, but in burger form!
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Ingredients
- 4 tbsp unsalted butter, divided
- 6 cups sliced onion + another small 1/2 onion, grated
- 1 1/4 tsp salt, divided
- 3 large garlic cloves, divided 1 clove should be minced for the onions and the other two should be grated for the patties
- 3/4 tsp dried thyme, divided
- 1/4 cup dry white wine
- 1/2 cup low-sodium beef broth, divided
- 1 lb ground beef
- 1 tbsp Dijon mustard
- 1 tbsp Worcestershire sauce
- 12 oz gruyere or swiss cheese, shredded
- 4 onion egg buns
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Instructions
- Preheat oven to broil. Spread the buns with 2 tablespoons of butter. Season with salt and pepper. Place under the broiler until golden brown. Set aside.
- Add 2 tablespoons of butte to a large cast iron skillet set over a medium heat. Add 6 cups of onions. Use a wooden spoon to toss the onions until they start to soften, about 2-3 minutes.
- Reduce the heat to medium-low and cook onions until they are soft and caramelized, which takes anywhere from 25 to 40 minutes. Be sure to stir every 7 minutes or so. Once the onions are almost completely caramelized, add the salt, garlic and 1/4 teaspoon thyme. Cook another 2-3 minutes until the garlic is softened.
- Increase the heat to medium and add white wine. Simmer until reduced and almost evaporated, about 2 minutes. Add 1/4 cup beef stock and reduce until almost evaporated, another 3-4 minutes. Season to taste with salt and pepper. Remove onions from pan and on to a plate, cover with foil to keep warm.
- While the onions caramelize, make the patties. Add ground beef, grated onion, grated garlic, remaining teaspoon salt, 1/2 teaspoon thyme, dijon and worcestershire sauce. Use hands to combine, do not over mix. Form in to four patties and set aside.
- If necessary, wipe the pan you cooked the onions in clean. Heat the skillet to a medium-high heat. Once the skillet is hot, add burger patties. Cook until seared on one side, about 3 minutes. Flip and sear another 2 minutes, and then evenly divide the cheese between the patties. Add the remaining beef stock to the pan and cover with a lid. Cook the burgers another 30 seconds or so until the cheese melts. (The liquid help to keep the patties moist and melt the cheese.)
- Serve patties on top of crispy buns, then pile with caramelized onions.
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