Lightly grease and base line two 20 cm/8 inch sandwich tins.
Add the cider vinegar to the soya milk and leave to stand for 10 minutes or until curdled.
Sift the flour, baking powder, bicarb and salt into a mixing bowl.
Stir in the sugar.
Pour in the oil, the milk and vinegar mixture and the vanilla extract. Stir until you have a smooth batter.
Pour the batter into your prepared tins.
Bake in the preheated oven for 25 - 30 mins until risen, firm to the touch, just beginning to pull away from the sides of the tin and a skewer inserted into the cakes comes out clean.
Cool in the tins for 5 minutes, then turn out onto wire cooling racks and allow to cool completely.
Spread jam, generously over one cake then place the other cake on top. Dust lightly with icing sugar and serve.
Notes
Nutritional information is only an approximate guideline. Calculations will vary according to the ingredients you use and your cooking methods.