Step 1

Heat a skillet over medium-high heat and add in the olive oil and butter. Toss in the diced onion and cook, stirring occasionally, for about 30 minutes, until the onions turn a deep, golden brown color. Remove from heat and set aside.

Step 2

In a separate mixing bowl, combine the ground beef, mayo, 1 tsp seasoned salt, garlic powder, black pepper and caramelized onions. Use clean hands to combine the meat mixture and shape into 4 hamburger patties.

Step 3

Season each side of the patties with the remaining seasoning salt and grill over medium-high heat, until cooked to desired temperature (about 3 to 5 minutes per side).

Step 4

Just before removing from the grill, top with the provolone cheese and let melt slightly. Enjoy with your favorite burger toppings.