Heat a griddle or skillet over medium-high heat and cook the bacon until crispy, about 5–7 minutes. Once the bacon is done, set it aside on a paper towel to cool slightly.
While the bacon cooks, slice the banana into thin rounds and break the chocolate bar into squares.
Spread the peanut butter onto one graham cracker half.
Roast the marshmallow over a campfire or fire pit until golden brown and gooey.
On top of the peanut butter-coated graham cracker, layer the banana slices, crispy bacon, and chocolate. Add the roasted marshmallow, then top with the second graham cracker half.
