01 - Preheat a large skillet or grill pan over medium heat.
02 - Butter one side of each bread slice evenly.
03 - Lay two slices of bread, butter-side down, on a clean cutting board. Layer each with one slice each of cheddar, mozzarella, and Gruyère.
04 - Drizzle 1 tbsp honey over the cheese on each sandwich.
05 - Top with the remaining bread slices, butter-side up.
06 - Transfer sandwiches to the preheated skillet. Cook for 3–4 minutes per side, pressing gently, until the bread is golden brown and the cheese is fully melted.
07 - Remove from the pan, slice in half, and drizzle with a little extra honey if desired. Serve immediately.