1. In a small bowl add the mayo, chipotle, and adobo sauce. Sprinkle with a pinch of salt and pepper and refrigerate until ready to use.

2. Divide the meat into four patties and place on a plate, using two-finger gently press the center down slightly. This ensures that the burgers don't shrink too much. Sprinkle salt, pepper, and garlic powder on both sides.

3. Heat a skillet/griddle I (I use cast iron) on medium-high heat add butter and sliced onions. Cook for about 5 minutes tossing the onions every minute or so. Then reduce heat to medium-low and sprinkle some salt and pepper and cook for about 15 minutes, tossing every couple minutes so they don't burn. Remove to a bowl.

4. Return the skillet/griddle to high heat. Add olive oil and place patties in skillet. Cook without moving for 3 minutes. Flip and cook another 2 minutes and add cheese, cover and cook another 1-2 minutes until cheese is melted.

5. Serve on soft buns with chipotle mayo. Top with lettuce, tomato, and caramelized onions.