In a large skillet, cook your bacon over medium heat for about 5-7 minutes, flipping occasionally until it's crispy and golden brown. Use a slotted spoon to transfer the cooked bacon to a paper towel-lined plate to drain excess fat. Make sure to save a little bacon grease in the skillet.

Lower the heat to medium-low and add 1-2 tablespoons of unsalted butter to the skillet with the bacon grease. Allow the butter to melt completely and bubble for about 1 minute.

Spread melted butter on the outside of each slice of bread. Place the turkey slices, creamy avocado, crispy bacon, and a handful of shredded cheddar cheese between the unbuttered sides.

Carefully place the assembled sandwich in the skillet, cooking each side for 3-4 minutes. Press down gently with a spatula, allowing the cheese to melt and the bread to become nicely browned.

Once the sandwich is perfectly toasted, remove it from the skillet and let it rest for about 1 minute. Cut the sandwich in half and serve warm.