01 - Arrange three shallow bowls: one with the flour, one with beaten eggs and milk, and one with panko breadcrumbs mixed with garlic powder, onion powder, paprika, salt, and pepper.
02 - Pat the cleaned mushrooms thoroughly dry with paper towels to ensure proper breading adhesion.
03 - Coat each mushroom in the flour, shaking off any excess to avoid a gummy layer.
04 - Submerge each floured mushroom into the egg and milk mixture, ensuring an even coating across the entire surface.
05 - Roll each mushroom in the seasoned panko mixture, pressing gently so the crumbs adhere firmly to the surface.
06 - Pour vegetable oil into a deep fryer or heavy-bottomed pot and heat to 350°F (180°C). Test with a small breadcrumb to confirm readiness.
07 - Carefully lower breaded mushrooms into the hot oil in small batches. Fry for 3 to 4 minutes, turning occasionally, until golden brown and crispy on all sides.
08 - Remove the fried mushrooms with a slotted spoon and drain on paper towels. Sprinkle with freshly chopped parsley and serve immediately with your preferred dipping sauce.