01 - Arrange three shallow bowls: fill one with flour, whisk together the eggs and milk in the second, and combine the panko breadcrumbs with garlic powder, onion powder, paprika, salt, and black pepper in the third.
02 - Pat the cleaned mushrooms thoroughly dry using paper towels to ensure the breading adheres properly.
03 - Coat each mushroom in the flour, shaking off any excess to create a light, even base layer.
04 - Submerge each floured mushroom into the egg and milk mixture, ensuring complete and even coverage.
05 - Roll each mushroom in the seasoned panko mixture, pressing gently so the crumbs adhere firmly on all sides.
06 - Pour the vegetable oil into a deep fryer or heavy-bottomed pot and bring it to 350°F over medium-high heat.
07 - Carefully lower the breaded mushrooms into the hot oil in small batches and fry for 3 to 4 minutes, turning occasionally, until golden brown and crisp.
08 - Remove the fried mushrooms with a slotted spoon and drain on paper towels. Garnish with fresh chopped parsley and serve hot alongside your preferred dipping sauce.