Adjust oven racks to low and middle positions and heat oven to 425 degrees. Line 2 baking sheets with parchment paper.

Spoon about 1 tablespoon cheese onto one sheet, then spread into a round with your fingertips so that cheese is more or less in a single layer. Repeat with remaining cheese, keeping cheese disks about 1 inch or so apart ( 12 wafers to a large sheet)

Bake until cheese stops bubbling, 9 to 10 minutes, switching sheets after 5 miinutes if they appear to be cooking unevenly. Transfer to a wire rack to cool.