For the crispiest texture avoid using pre-shredded cheese that contains added starches or anti-caking agents and shred blocks of cheese instead. Parmesan will yield the crispiest, cracker-like rounds, while cheddar gives a classic chip-like crunch and mozzarella stays a bit chewier unless baked slightly longer. If you prefer very thin and lacy crisps, spread the cheese into slightly larger and thinner circles and watch the baking time closely. These crisps are best stored in a cool, dry spot and can be re-crisped in a warm oven for a few minutes if they soften. Always check nutrition labels on cheese and seasonings to ensure there are no hidden sugars or starches that would add extra carbs.