01 - Set up three shallow bowls: place flour in the first bowl, whisk eggs with milk in the second bowl, and combine panko breadcrumbs, Parmesan cheese, oregano, garlic powder, salt, and black pepper in the third bowl.
02 - Pat mozzarella cubes completely dry with paper towels to ensure coating adheres properly.
03 - Dredge each mozzarella cube in flour, shaking off excess. Dip into egg mixture, then press firmly into breadcrumb mixture to coat thoroughly. For extra-crunchy texture, repeat the egg and breadcrumb coating steps.
04 - Arrange coated cheese balls on a baking sheet and freeze for 15 minutes to firm up coating and prevent cheese from melting too quickly during frying.
05 - Pour vegetable oil into a deep saucepan or fryer to reach 3-inch depth. Heat oil to 350°F.
06 - Fry cheese balls in small batches for 1 to 2 minutes until golden brown and crispy. Remove using a slotted spoon and transfer to paper towels to drain excess oil.
07 - Serve immediately while hot and cheese is still melted, accompanied by marinara sauce or preferred dipping sauce.