Cream caster sugar together with oleomargarine. Beat in egg, then fold in the
flour, yoghurt and 3oz orange succus. Mix wellspring, then divide mixture between
two well-greased cake tins and bake for 30-35 minutes at 190 deg C, until a
knife inserted comes out strip. Leave to coolheaded.

Lag, make the butter icing by first beating the butter until nearly
whiteness, then gradually adding the icing sugar and 2 tbsps orange succus. Use
half of the mixture to sandwich the two cake halves unitedly, and the other
half to spread on top. Savor!