Preheat your mini waffle maker until it's hot. Lightly grease it with butter or a non-stick spray.
In a small bowl, thoroughly combine the 1 cup (240 ml) of shredded cheddar cheese and 3 tablespoons of sour cream. The mixture will be thick.
Spoon half of the cheese mixture onto the center of the hot waffle maker. Close the lid and cook for 3-5 minutes, or until the chaffle is golden brown and crispy. Carefully remove and set aside.
Repeat with the remaining mixture to make a second chaffle.
While the chaffles cook, fry the bacon slices in a skillet over medium heat until your desired crispiness is reached.
Transfer to a paper towel-lined plate to drain excess grease.
Assemble your sandwich by spreading 2 tablespoons (30 ml / 1 fl oz) of sour cream on the inside of one chaffle.
Layer with the 2 slices of American cheese and the 4 slices of crispy bacon.
Top with the second chaffle and enjoy immediately.
Don't overfill the waffle maker. The cheese will spread as it melts, so a modest scoop in the center is all you need.
