Preheat your mini waffle maker according to the manufacturer’s instructions for about 5 minutes.

In a small bowl, whisk together the egg, garlic powder, and shredded cheddar cheese until well combined.

Pour half of the chaffle batter into the center of the preheated waffle maker, close the lid, and cook for 3-4 minutes until golden brown.

Remove the first chaffle and repeat the process with the remaining batter.

In a non-stick pan over medium heat, melt 1 tablespoon of butter, coating the surface evenly.

Place one cooked chaffle in the pan, top with American cheese, then place the second chaffle on top.

Grill the sandwich for about 1 minute until the bottom is golden brown, then flip and grill for an additional 1-2 minutes.

Transfer the grilled chaffle to a cutting board, cut in half, and serve immediately.