01 -
In a large mixing bowl, whisk together the flour, garlic powder, and salt until evenly distributed. Pour in chilled whole milk and whisk until a smooth, lump-free batter forms.
02 -
Pour vegetable oil into a large heavy-bottomed pan or deep fryer. Heat to 370°F (188°C), maintaining an oil temperature between 360°F (182°C) and 380°F (193°C) throughout frying.
03 -
Dip individual mushrooms into the prepared batter, allowing any excess to drip off. Repeat with remaining mushrooms.
04 -
Using a slotted spoon, gently lower battered mushrooms into the hot oil, working in small batches to prevent overcrowding. Fry for about 4 minutes or until deeply golden brown. For larger mushrooms, extend frying by 30 to 60 seconds as needed.
05 -
Remove fried mushrooms with a slotted spoon and transfer to a paper towel-lined plate to drain excess oil. Immediately sprinkle with additional salt and garnish with fresh parsley. Serve hot.