Crafting your incredible Caramelized Onion Burger is straightforward when you follow these steps:

1. Caramelize the Onions: In a skillet, heat olive oil and butter over medium heat. Once melted, add the onions.
2. Cook Onions: Stir occasionally, allowing them to cook down and caramelize for about 15-20 minutes. Season with salt and taste as you go.
3. Form Patties: While the onions cook, form the ground beef into four patties. Make sure not to overwork the meat to keep it tender.
4. Season Patties: Season both sides of the patties with salt and pepper to taste.
5. Cook Burgers: In a separate skillet or on a grill, cook the patties over medium-high heat. Cook for around 4-5 minutes on each side or until your desired doneness.
6. Melt Cheese: If using cheese, place a slice on each patty during the last minute of cooking to allow it to melt.
7. Prepare Buns: Toast the burger buns lightly, either in a toaster or on the grill.
8. Assemble the Burger: On the bottom half of the bun, layer lettuce, a burger patty with melted cheese, and top generously with caramelized onions.
9. Add Condiments: Add any additional toppings or sauces you desire, followed by the top half of the bun.
10. Serve: Enjoy your Caramelized Onion Burger while hot and freshly made.

Each step brings flavors together, ensuring a burger that dreams are made of.