Preheat oven to 400 degrees

Spray mini muffin pan with non-stick spray or grease the bottoms of the tins with butter

Whisk the egg whites and divide between the 24 mini muffin cups

Sprinkle the shredded cheddar cheese over the egg whites

Bake for 10 minutes or until edges are just starting to brown

Remove from oven and let cool

Remove crisps from muffin tins and enjoy