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Best Garlic Herb Burger with Caramelized Onions

Juicy Garlic Herb Burger with Sweet Caramelized Onions Recipe
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A juicy and bold garlic herb burger topped with sweet, caramelized onions.

Ingredients

Scale
  • 2 large yellow onions, thinly sliced
  • 1 tablespoon butter
  • 1 tablespoon olive oil
  • 1/2 teaspoon kosher salt
  • 1 teaspoon balsamic vinegar (optional)
  • 1/2 teaspoon sugar (optional)
  • 1 pound ground beef (80/20 for juicy burgers)
  • 3 cloves garlic, minced
  • 2 tablespoons fresh parsley, finely chopped
  • 1 teaspoon fresh rosemary, finely chopped (or 1/2 teaspoon dried)
  • 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried)
  • 1 teaspoon Worcestershire sauce
  • 1 teaspoon Dijon mustard
  • 1 teaspoon kosher salt
  • 1/2 teaspoon black pepper
  • 1 tablespoon olive oil (for cooking)
  • 4 burger buns (brioche or sesame)
  • 4 slices cheese (Swiss, provolone, or cheddar, optional)
  • Lettuce, tomato, pickles (optional)
  • 1/4 cup mayonnaise
  • 1 small clove garlic, grated
  • 1 tablespoon chopped parsley
  • 1 teaspoon lemon juice
  • Pinch of salt and pepper

Instructions

  1. Heat a large skillet over medium-low. Add butter and olive oil.
  2. Add onions and salt. Cook, stirring every few minutes, until deep golden and soft, 25–35 minutes.
  3. Stir in balsamic and sugar if using. Cook 1–2 minutes more. Set aside.
  4. In a bowl, mix beef, garlic, parsley, rosemary, thyme, Worcestershire, Dijon, salt, and pepper. Mix gently until just combined.
  5. Divide into 4 equal balls. Form 4 patties about 3/4 inch thick. Press a small dimple in the center of each. Chill for 10–15 minutes.
  6. Heat a cast-iron skillet or grill over medium-high. Add a little oil.
  7. Cook patties 3–4 minutes on the first side. Flip and cook 3–4 minutes more, or until done to your liking (160°F for ground beef). Add cheese in the last minute.
  8. Toast buns cut side down in the skillet or on the grill until golden.
  9. Stir together mayo, garlic, parsley, lemon, salt, and pepper.
  10. Spread garlic herb mayo on buns. Add patty, a scoop of caramelized onions, and any toppings you like. Close and serve.

Notes

Caramelize onions ahead of time to save on busy nights. You can use gluten-free buns or lettuce wraps for dietary needs.

Nutrition

Find it online: https://sourdoughvoyage.com/best-garlic-herb-burger-caramelized-onions/