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.
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