A juicy beef burger topped with rich caramelized onions, melted Swiss cheese, and a creamy black garlic truffle mayo, all served on a toasted bun.
Ingredients
For the burgers:
- 1 lb (450 g) ground beef
- Salt and black pepper, to taste
- 4 slices Swiss cheese
- 2 brioche or hamburger buns
- 1 tablespoon butter or oil
For the caramelized onions:
- 2 large yellow onions, thinly sliced
- 1 tablespoon butter
- ½ cup beef stock
- ½ teaspoon salt
- ¼ teaspoon black pepper
For the black garlic truffle mayo:
- ½ cup mayonnaise
- 2 cloves black garlic, finely mashed
- 1 teaspoon truffle oil
- ½ teaspoon lemon juice
- Pinch of salt
Step-by-Step Instructions
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