Preheat the oven to 170C/335F/Gas 3 and line a 25cm/10in round deep cake tin with non-stick paper ... then stir in the fruit. Mix the flour and soda together, then stir this through evenly.
Delia shows you how to bake a perfect sponge cake with a creamy passion fruit filling. Equipment: You will also need two 8 inch (20 cm) 1½ inch (4 cm) deep sponge tins, lightly greased and the ...