Prepare the Cheese: Cut mozzarella block into sticks about 3 to 4 inches long and 1/2 inch thick. Pat them dry with paper towels to remove excess moisture.
Set Up Breading Station: Organize three shallow bowls: one with flour seasoned with salt and pepper, one with beaten eggs, and one with breadcrumbs mixed with garlic powder, Italian seasoning, salt, and pepper.
Bread the Sticks: Working one stick at a time, coat thoroughly in flour (shake off excess), dip in beaten egg, then coat in seasoned breadcrumbs. For extra crunch, repeat the egg and breadcrumb steps for double-breading. Place breaded sticks on a tray and freeze for at least 30 minutes.
Heat the Oil: Pour about 2 inches of oil into a heavy-bottomed pot or deep skillet. Heat to 375°F (190°C). Use a thermometer to maintain temperature.
Fry to Golden Perfection: Carefully lower 3 to 4 mozzarella sticks into the hot oil using tongs. Fry for 1 to 2 minutes until golden brown and crispy. Do not overcrowd the pot. Remove with slotted spoon and drain on wire rack.
Serve Immediately: Mozzarella sticks are best enjoyed hot and fresh. Serve with marinara sauce, ranch dressing, or your favorite dipping sauce.