by Delia Smith

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 bases lined with baking paper.

Cakes and baking

Buyer's guide

Unrefined golden caster sugar with some molasses left in is also available. This gives baked dishes a more intense flavour and a darker result.


Keep caster sugar in a cool, dry cupboard away from heat or moisture.


Ideal for meringues, caster sugar is used in baking, desserts, drinks and cocktails. It adds more volume to baked goods, and gives them a lighter texture. If you do not have caster sugar to hand, grind granulated sugar in a food processor for a couple of minutes.