Beef Burger Caramelized Onions (Printable)

A flavorful beef burger featuring caramelized onions and Swiss cheese on a toasted bun.

# What You Need:

→ For the Caramelized Onions

01 - 2 large yellow onions, thinly sliced
02 - 2 tablespoons unsalted butter
03 - 1 tablespoon olive oil
04 - 1/2 teaspoon salt
05 - 1/2 teaspoon sugar
06 - 1 tablespoon balsamic vinegar (optional)

→ For the Beef Patties

07 - 1 1/2 pounds ground beef (80/20 blend recommended)
08 - 1 teaspoon salt
09 - 1/2 teaspoon black pepper
10 - 1/2 teaspoon garlic powder

→ For Assembly

11 - 4 slices Swiss cheese
12 - 4 burger buns, split and toasted
13 - 2 tablespoons mayonnaise (optional)
14 - 2 cups fresh lettuce leaves
15 - 1 large tomato, sliced
16 - Dill pickle slices (optional)

# Directions:

01 - Heat butter and olive oil in a large skillet over medium heat. Add sliced onions, salt, and sugar. Cook, stirring occasionally, until onions are golden and deeply caramelized, about 20 minutes. Stir in balsamic vinegar, if using, and cook 1 more minute. Set aside.
02 - In a bowl, gently mix ground beef with salt, pepper, and garlic powder. Divide into 4 equal portions and shape into patties slightly larger than the buns. Make a shallow indentation in the center of each patty to prevent puffing.
03 - Preheat a grill or skillet over medium-high heat. Cook patties for 3–4 minutes per side (for medium), flipping once. Place a slice of Swiss cheese on each patty during the last minute and cover to melt.
04 - Lightly toast the buns on the grill or in a toaster until golden.
05 - Spread mayonnaise on the bottom buns (if using). Add lettuce, tomato, then the beef patty with melted Swiss. Top with caramelized onions and pickles (optional). Cover with top bun.
06 - Serve immediately with your favorite sides.

# Expert Tips:

01 -
  • The caramelized onions become sweet and savory, balancing the rich beef perfectly
  • Swiss cheese melts beautifully and adds a nutty depth without overpowering the other flavors
  • The 8020 ground beef blend ensures juicy burgers that hold their shape on the grill
02 -
  • Do not rush the onions, low and slow is what transforms them from raw slices into sweet savory jam
  • Let the patties rest for a couple minutes after cooking to keep the juices inside where they belong
  • The thumbprint trick really works to prevent your burgers from turning into meatballs
03 -
  • Season your patties right before cooking, not ahead, to keep the meat tender
  • A cast iron skillet gives you the best crust if you are not using a grill
  • Wipe your grill or skillet between batches to avoid burnt bits affecting the flavor

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