Remove the mozzarella sticks from their wrappers. Pat them dry with paper towels. Any extra moisture can make the coating less crisp, so take a moment to dry each cheese stick well.

Place flour in one shallow bowl. Whisk eggs with milk in another bowl. In a third bowl, combine breadcrumbs, Parmesan, Italian seasoning, garlic powder, paprika, pepper, and salt.

Roll each mozzarella stick in flour first. Dip it into the egg mixture. Then coat it generously with the seasoned breadcrumbs. Press the crumbs gently so they stick well.

Dip each coated mozzarella stick into the egg again. Roll it through the breadcrumbs for a second time. This extra layer creates a stronger crust and helps prevent cheese from escaping during frying.

Place the coated sticks on a parchment-lined baking sheet. Freeze them for at least two hours. For the best results, make sure the coating becomes completely firm before frying.

Pour vegetable oil into a deep skillet or fryer. Heat it to about 350°F (175°C). Use a kitchen thermometer if available. Correct oil temperature helps create a crisp coating without burning.

Carefully place a few frozen mozzarella sticks into the hot oil. Do not overcrowd the pan. Fry for about one to two minutes, turning gently until the coating becomes golden brown.

Remove the fried sticks with tongs. Place them on a wire rack or paper towels. Let excess oil drain away. Avoid stacking them because this can soften the crispy coating.

Arrange the crispy mozzarella sticks on a serving plate. Add warm marinara sauce on the side. Serve immediately while the outside is crunchy and the cheese inside is perfectly melted.