Preheat Oven – Preheat oven to 375°F (190°C). Grease a muffin tin or line with paper liners.
Mix Dry Ingredients – In a bowl, whisk together flour, baking powder, salt, Italian seasoning, and garlic powder.
Add Wet Ingredients – Stir in milk and egg until just combined.
Fold in Cheese & Pepperoni – Gently mix in mozzarella, Parmesan, and chopped pepperoni.
Fill Muffin Tin – Divide the batter evenly into 12 muffin cups (about ¾ full).
Bake – Bake for 18-20 minutes until golden and puffed.
Cool & Serve – Let cool for 5 minutes, then remove from the tin. Serve warm with pizza sauce for dipping.