01 - Trim the root ends of the enoki mushrooms and separate into small clusters. Pat thoroughly dry with paper towels.
02 - In a medium mixing bowl, whisk together all-purpose flour, cornstarch, baking powder, sea salt, and white pepper.
03 - Gradually pour in the cold sparkling water, stirring gently until a smooth, slightly thick batter forms. Avoid overmixing.
04 - Pour vegetable oil into a deep pan or wok and heat to 350°F (180°C) over medium-high heat.
05 - Dip separated enoki mushroom clusters into the batter, allowing any excess to drip back into the bowl.
06 - Carefully lower the battered mushrooms into the hot oil in small batches. Fry for 2 to 3 minutes, turning as needed, until golden brown and crisp.
07 - Remove the fried mushrooms with a slotted spoon or spider strainer. Drain on paper towels. Serve hot, garnished with chives or scallions and sesame seeds, accompanied by dipping sauce if desired.