Crack egg into each muffin cup, making sure to not break the yolk.
Sprinkle cheese on top of the egg, covering surface.
Sprinkle bacon pieces on top of cheese. If you want a runny yolk and want to gage the doneness of the yolk, only sprinkle cheese and bacon on the egg white and make sure not to cover yolk.
Bake at 400F for 8-10 minutes depending on how well done you want your yolk.