Step 1

For the batter, sift the cornflour and flour together into a medium bowl.

Step 2

Make a well in the centre and add the egg and beer and whisk from the centre outwards, until just combined (it is okay if the batter is a little lumpy). Allow the batter to stand for a few minutes in a cool place.

Step 3

Heat the oil in a deep heavy-bottomed pan until a breadcrumb sizzles and turns brown when dropped into it. (CAUTION: hot oil can be dangerous. Do not leave unattended.)

Step 4

Place the flour onto a plate and dredge the prawns into it to cover well. Dip the prawns into the batter and carefully add to the hot oil to deep-fry in batches for 2-3 minutes, or until crisp and golden.

Step 5

Carefully remove with a slotted spoon and drain on kitchen paper.

Step 6

Serve in bowls with a bowl of soy sauce for dipping.