Preheat oven to 400F and line a baking sheet with parchment paper or foil.
Place pepperoni slices on the lined baking sheet, and place a mozzarella string cheese slice on the center of each pepperoni.
Bake for 8 to 10 minutes or more until cheese starts to brown and pepperoni is crisp.
Remove pepperoni cheese chips from oven.
Let cool a little until cheese is dry (can pat with paper towel for excess grease once cheese is completely dry and crisp).
Serve with or without pizza sauce. Low carb ranch dressing is also good for dipping these in.
