Preheat oven to 400°F. Line a baking sheet with parchment paper or a silicone mat.
Place heaping tablespoons of grated Parmesan onto the sheet, lightly patting each mound without flattening completely.
Bake for 3 to 5 minutes, until golden and crispy.
Let crisps cool completely on the baking sheet before removing.
Serve immediately or store in an airtight container at room temperature for 2 to 3 weeks.