Prepare the breading station by setting up three shallow bowls: one with flour, the second with breadcrumbs mixed with salt and pepper, and the third with a mixture of eggs and milk.

Coat each string cheese stick with flour evenly to help the batter stick.

Dip the floured cheese stick into the egg and milk mixture, ensuring it is fully submerged for the coating to adhere.

Roll the cheese stick in the seasoned breadcrumbs, making sure to cover it completely, and double dredge for extra crunch.

Freeze the coated sticks on a parchment-lined tray for at least 2 hours to maintain their shape during frying.

Heat the oil in a deep pot to 350°F (175°C) using a thermometer for accuracy.

Fry a few frozen cheese sticks in the hot oil for 2-3 minutes until golden brown and crisp.

Use a slotted spoon to transfer the fried mozzarella sticks to a plate lined with paper towels to absorb excess oil.