01 - Preheat oven to 400°F and line a baking sheet with parchment paper or silicone baking mat.
02 - Place pepperoni slices in a single layer on prepared baking sheet, spacing evenly.
03 - Distribute cheddar and mozzarella cheese mixture evenly over each pepperoni slice.
04 - Sprinkle with Italian herbs and red pepper flakes if desired for added flavor.
05 - Bake for 8-10 minutes until cheese bubbles and turns golden, with crisp pepperoni edges.
06 - Let chips rest on tray for 2-3 minutes to set, then transfer to paper towel-lined plate.
07 - Serve immediately while warm or allow to reach room temperature.