01 - Arrange three shallow bowls: the first with flour, the second with beaten eggs and milk, and the third with panko breadcrumbs combined with garlic powder, onion powder, paprika, salt, and pepper.
02 - Pat the cleaned mushrooms thoroughly dry with paper towels to ensure the breading adheres properly.
03 - Coat each mushroom in flour, shaking off any excess to create a light, even layer.
04 - Submerge each floured mushroom into the egg and milk mixture, coating evenly on all sides.
05 - Roll each mushroom in the seasoned panko breadcrumbs, pressing gently to help the coating adhere firmly.
06 - Heat vegetable oil in a deep fryer or heavy-bottomed pot to 350°F (180°C).
07 - Fry the breaded mushrooms in batches for 3 to 4 minutes, turning occasionally, until golden brown and crispy.
08 - Remove the mushrooms with a slotted spoon and drain on paper towels. Sprinkle with freshly chopped parsley and serve hot with your favorite dipping sauce.