01 - Combine honey, hot sauce, and red pepper flakes in a small bowl until thoroughly mixed. Set aside.
02 - In a skillet set over medium heat, cook bacon until uniformly crispy. Transfer to a plate lined with paper towels to drain excess fat.
03 - Spread softened butter evenly on one side of each slice of bread.
04 - Lay two slices of bread, buttered side down, on a clean work surface. Layer each with cheddar cheese, mozzarella cheese, and cooked bacon. Top with remaining bread, buttered side facing up.
05 - Heat a skillet or grill pan over medium-low. Place sandwiches in the pan and cook for 3 to 4 minutes per side, pressing gently, until bread is golden-brown and cheese is fully melted.
06 - Remove sandwiches from the pan, slice in half, and generously drizzle with hot honey before serving.