
Whisk flour, cornstarch, baking powder, and salt together, then stir in ice-cold sparkling water until just combined — lumps are fine.
Pat all vegetables and shrimp completely dry, then lightly dust with a thin coating of cornstarch before dipping.
Dip each piece into the batter, let excess drip off, and place in the air fryer basket in a single layer without crowding.
Air fry at 380°F for 7–8 minutes per batch, flipping once halfway through, until the batter is puffed and deeply golden.
Mix soy sauce, rice vinegar, sugar, and gochugaru for the dipping sauce.
Serve immediately on a wire rack to keep the bottoms crispy, with dipping sauce alongside.
Tip: The secret to crispy Korean tempura is keeping everything ice cold — chill your mixing bowl and use sparkling water straight from the fridge.
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