Creating your own Caramelized Onion Grilled Cheese is as easy as following these steps:

1. Melt Butter: In a large skillet, melt 2 tablespoons of butter over medium heat.
2. Add Onions: Once the butter is melted, add the sliced onions. Season with salt and pepper.
3. Saute Onions: Cook the onions, stirring occasionally for about 10 minutes, until they begin to soften.
4. Add Sugar: Sprinkle the sugar over the onions and continue cooking, stirring frequently, until they are golden brown and caramelized (about another 10 minutes). Remove from heat.
5. Assemble Sandwiches: While the onions are cooking, take 2 slices of bread and butter one side of each.
6. Layer Cheese and Onions: Place one slice of bread, butter-side down, on a clean cutting board. Top with 1-2 slices of cheese and a generous amount of the caramelized onions. Top with the second slice of cheese and finally the second slice of bread, butter-side up.
7. Cook Sandwich: Place the sandwich in the same skillet over medium heat. Cook for 3-5 minutes on each side, or until both sides are golden brown and the cheese is gooey.
8. Repeat: Repeat with the second sandwich.
9. Slice and Serve: Once done, remove from skillet, slice in half, and enjoy while warm!

These straightforward steps will help you create an incredible Caramelized Onion Grilled Cheese that will have everyone raving!