best vegan chocolate cake

This recipe is from Healthy eating for a new age by Joyce D'silva and it is brilliant, this is the cake that our kids always wanted for their birthday cake. it is full of sugar and bad for you in every way but most importantly nothing had to die to make it so indulge and enjoy as it is cruelty free.

9oz 81% self raising whole wheat flour which can be obtained by sieving whole wheat flour which removes some of the bran.
1oz cocoa powder
5oz soft brown sugar
4 fl oz. oil
10 fl oz. water
2 teaspoons baking powder

Filling:
3oz margarine
5oz brown sugar
1 tablespoon cocoa powder

Gently heat water, oil and sugar until the sugar dissolves, and cool completely because if it is hot still it will activate the baking powder too soon and your cake will not rise.
Sift dry ingredients into a bowl and add liquid stirring well.
Pour into two greased and floured sandwich tins, it is important to grease and flour thoroughly to prevent sticking when cooked.
Bake at 350f mark 4 for about 20/25 minutes. Two tests if you are unsure, first is stick a knife in and it should come out clean second is if you press your finger gently into the centre it should spring back up, you can also check it by sight, it should be just going darker at the edges but a combination of all three will give you perfect results. When cooked turn out onto a wire rack and allow to cool.
To make filling , cream the margarine and sugar. Dissolve the cocoa in a little water and beat it in. When the cake is cool sandwich it with the mixture.
Melt plain chocolate cake covering, Sainsbury's sell a really nice Belgian chocolate cake covering that is vegan, by breaking it up into a cup/mug in a pan of simmering water like a Bain Marie, and pour/ spread it over the cake until it is covered all over then place in the fridge for 30 mins to an hour until it set and hard. Serve by cutting with a sharp bread knife and pour on a little soya cream or soya milk.
If you follow this recipe carefully it works really well, if it does not work you did not pay enough attention to the detail, when it works it is delicious so worth perfecting, very moreish, enjoy