Cut each string cheese stick in half to create shorter, manageable pieces.
In one bowl, whisk together the buttermilk and egg until well combined. In another bowl, mix Panko bread crumbs, Italian herbs, smoked paprika, garlic powder, salt, and black pepper.
Dip each cheese piece into the buttermilk mixture, allowing excess to drip off, then roll it in the Panko mixture, pressing gently to adhere. Repeat for all pieces.
Heat oil in a deep fryer or heavy-bottomed pot to 350°F (175°C), using a thermometer to monitor.
Fry cheese sticks in batches for 2-3 minutes until golden brown, turning occasionally for even cooking.
Remove fried cheese sticks with a slotted spoon and drain on paper towels. Serve immediately with your favorite dipping sauce.