Pepperoni and cheese pinwheels are a fun and easy appetizer that can be made with a food processor. To make the dough, you will need 2 cups of all-purpose flour, 1 tablespoon of baking powder, 1/2 teaspoon of salt, 1/2 cup of cold butter, 2/3 cup of milk, and 1/2 cup of shredded mozzarella cheese. Combine the flour, baking powder, and salt in the food processor and pulse until well combined. Add the cold butter and pulse until the mixture resembles coarse crumbs. Add the milk and pulse until a dough forms. Roll out the dough into a rectangle, then sprinkle with shredded mozzarella cheese and chopped pepperoni. Roll up the dough tightly and slice into pinwheels. Bake in a preheated oven at 400°F for 15-20 minutes or until golden brown.