Preheat a medium-sized saucepan to medium-high heat and add oil, butter, onions, and garlic. Continuously sauté, then reduce to medium heat and continue to cook for 10 minutes, stirring onion mixture every minute or so until browned, caramelized, and translucent.

Remove onion mixture from oil and place in a blender. Blend until finely minced, then add the rest of the ingredients. Pinch salt and pepper into blender until smooth and well-incorporated and season to taste.

Remove burgers from refrigerator and allow to come to come room temperature – about 20 minutes. Season burgers on both sides with Omaha Steaks Seasoning.

In a large cast-iron pan, bring to medium-high heat and add vegetable oil. Cook burgers on one side until browned – about 3 to 4 minutes. Flip burgers, add a slice of Gouda cheese to each, and continue to cook another 3 to 4 mins until cheese melts. Once cooked to desired doneness, remove burgers from pan.

To toast buns, spread 1 tablespoon of mayonnaise on each side of bun and place in a separate pan on medium-high heat, toasting about 30 to 45 seconds until golden brown.

Assembly: Spread smoky-sweet onion mayo on both toasted buns. Place about 4 to 6 onion slices and 3 pickles on bottom bun, top with cheeseburger and then top bun.