Preheat your mini waffle maker on high for about 5 minutes.

In a mixing bowl, whisk together one large egg and one cup of shredded cheddar cheese. Add garlic powder if desired.

Pour half of the chaffle mixture into the waffle maker and cook for 4 minutes.

Remove the first chaffle and repeat with the remaining batter.

Melt one tablespoon of unsalted butter in a skillet over medium heat.

Assemble the sandwich with one chaffle, a slice of American cheese, and the second chaffle on top.

Grill the sandwich in the skillet for 1-2 minutes per side until golden brown.

Let it cool slightly, cut in half, and serve hot.