01 -
Preheat an individual sandwich maker or skillet over medium-high heat.
02 -
Place one cheese slice on one bread slice. Spread avocado slices over the cheese, leaving a small border of cheese around the edges.
03 -
Top with the second slice of cheese, bacon slices, and the remaining bread slice.
04 -
Combine the melted butter and mayonnaise. Spread half of the mixture onto the top slice of bread.
05 -
Carefully place the sandwich into the sandwich maker with the butter-mayo side down. Spread the remaining mixture on the other side of the sandwich, close the sandwich maker, and cook for 2 to 5 minutes or until the sandwich is golden brown and the cheese is melted. Remove sandwich with a spatula or tongs, cut in half, and serve immediately.
06 -
Place sandwich in preheated skillet, spread butter-mayo mixture on the second side, and cook for 3 minutes. Flip the sandwich and cook for an additional 2 minutes, pressing gently with a spatula or grill press. If the bread seems dry, add a little extra butter and cook for a few more seconds on both sides until golden brown and the cheese is melted.