Preheat the oven to 400°F (200°C)
Line a baking sheet with parchment paper or a silicone baking mat
Grate Parmesan cheese finely
Spoon small mounds of cheese onto the baking sheet, leaving space between them
Flatten each mound slightly into thin circles
Bake for 5 to 7 minutes until golden and crisp
Remove from the oven and let cool on the baking sheet for a few minutes
Transfer to a wire rack to cool completely
Serve or store in an airtight container once fully cooled