
Recipe 1 - Skillet:
Makes 5 crisps
2 1/2 cups freshly grated Parmesan
Heat an 8-inch nonstick skillet over medium heat. Sprinkle 6 tablespoons of the cheese into the pan so it forms a lace-thin layer that fills the bottom of the skillet. The cheese will bubble in the pan. When the top side of the cheese has reached a pale gold color, after 3 to 4 minutes, remove the pan from the heat and allow the cheese to firm up for 1 minute. Carefully turn the cheese over with a spatula, return to heat, and cook until cheese is golden on both sides, about 1 more minute. Remove the cracker and drain it on paper towels to absorb any excess fat. Wipe the skillet clean with paper towels and repeat the process 5 more times with the remaining cheese.
Source: Michael Chiarello - Food Network

Recipe 2 - Oven:
Makes 8 - 10 crisps
1/2 cup grated Parmesan
Preheat oven to 400 degrees F.
Pour a heaping tablespoon of Parmesan onto a silicone or parchment lined baking sheet and lightly pat down. A silicone baking sheet is highly recommended. Repeat with the remaining cheese, spacing the spoonfuls about a 1/2-inch apart.
Bake for 3 to 5 minutes or until golden and crisp. Cool.
Source: Giada de Laurentiis - Food Network