Juicy beef burgers topped with caramelized onions and melted cheese, inspired by the classic flavors of French onion soup.

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Heat butter and olive oil in a large skillet over medium heat. Add sliced onions, sugar, and a pinch of salt. Cook, stirring occasionally, until onions are deeply caramelized, about 25-30 minutes.
While onions cook, preheat grill or skillet over medium-high heat.
In a bowl, mix ground beef with Worcestershire sauce, garlic powder, salt, and pepper. Form into 4 equal patties.
Grill or cook the patties for 4-5 minutes per side, or until desired doneness.
Top each burger with a slice of cheese during the last minute of cooking and cover to melt.
Toast hamburger buns if desired.
Assemble the burgers by placing a patty on each bun bottom, topping with caramelized onions and condiments of choice, then the top bun.

Gruyère cheese gives an authentic French onion flavor, but Swiss or provolone can be substituted.
Caramelizing onions slowly is key—don’t rush the process.
Use brioche buns for added richness.