In a shallow bowl, mix the flour, garlic powder, smoked paprika, and black pepper. In another bowl, whisk the eggs and milk together. Place the crushed Doritos in a separate bowl.

Dip each mozzarella cube into the flour mixture, then coat in the egg mixture, and finally roll in the crushed Doritos, pressing firmly to adhere. For an extra crispy coating, repeat the egg and Doritos step.

Heat vegetable oil in a deep pan over medium-high heat to 350°F (175°C). Fry the coated cheese cubes in batches for 30-45 seconds or until golden brown. Remove with a slotted spoon and drain on a paper towel-lined plate.

Serve immediately with ranch or marinara sauce for dipping.