soda water - enough to make a thick batter (will coat your finger)
Method
Clean the crabs
Snip off the face with scissors
Lift up the sides of the shell to reveal the gills and pull them off.
The back end has the apron, which you can peel back off the body and then tear off.
Pat dry with paper towel and then cut in half
Tempura batter
Pre heat the oil in the deep fryer or wok to 180°c / 355°f
Place the flours, baking powder, egg and sesame seeds in a bowl and slowly stir in the cold soda water till you get a thick batter consistency - it should coat your finger.
Dip the cleaned soft shell crabs into the batter and then carefully place in to the deep fryer. Cook till the tempura batter turns golden and crispy, about 4-5 minutes.
Recipe by Finding Feasts at https://www.findingfeasts.com.au/recipe-index/soft-shell-crab-in-a-sesame-tempura/