1 Cook the bacon over medium-low heat in a skillet, turning it occasionally, until it turns crispy. This will take about 5 minutes. When you are done, place the bacon on a plate lined with paper towels so that the excess grease can drain.2 Spread some butter on one side of each slice of bread. This will be on the outside of your sandwich and help make it extra crispy when you grill it. 3 Sprinkle ¼ cup (25 grams) of cheese onto the unbuttered side of one of the bread slices. Save the rest of the cheese for the other half of the sandwich. This will help "glue" your sandwich together so that it doesn't fall apart. 4 Add the guacamole, bacon, and the rest of the cheese. If you don't like guacamole, you can either leave it out or use a few thin slices of avocado instead. 5 Finish off with the other slice of bread. Make sure that the buttered side is facing up. This will help prevent the sandwich from sticking to the skillet.