Everything is better with bacon. This hot, melty spin on your childhood favorite with fig jam, bacon, and American cheese will have you wondering why you were making your PB&J's all wrong your whole life. If you're not into American cheese, extra-sharp Cheddar works great here, too.
Cook the bacon in a large dry pan over medium-low heat until crispy, about 5 minutes, and then transfer to paper towels to drain. Pour out the fat from the skillet, but leave a thin coating in the pan; do not wipe the skillet. Brush 1 side of each bread slice with the melted butter. Flip and spread 2 of the slices with the peanut butter, and 2 of the slices with the jam. Top the peanut butter slice with 1/2 of the bacon and 1/2 of the cheese. Transfer the bread slices back to the pan over medium heat, and cook until bottom of bread is lightly browned and the cheese is beginning to melt, 1 to 2 minutes. Turn the heat to low and cover with a lid until cheese is completely melted, about 1 minute longer.
Assemble sandwiches and serve.