In a small bowl, mix the flour, baking powder, baking soda, salt, milk, and olive oil.
Add the mixture to the mug, and then spoon the pizza sauce on top. Add the cheese, pepperoni, and seasonings.
Set the mug into the air fryer basket and set the tempura to 350 degrees F, air fryer setting, cook for 5 to 8 minutes or until the dough is fully cooked.