DOUBLE CHOCOLATE CHIFFON CAKE

I like light cakes

like Chiffon and Sponge

but 

not my hubby

he prefers heavy butter cakes to these

I adapted the recipe from here

Double Chocolate Chiffon Cake

1) 95g cake flour sifted together with

          15g cocoa powder

         1/2 tsp baking powder

         1/2 tsp baking soda
          pinch of salt

2) 70g dark cooking chocolate, double boil to melt

3) 5 AA egg yolks beat with
           50g sugar, then mix in

           75g oil 

          100g fresh milk & melted chocolate

           fold in dry ingredients, leave aside

4) 5 AA egg white whisk with

           1/2 tsp cream of tartar

           80g sugar

5) mix 1/3 of egg white to egg yolk mixture, mix until well combined

6) fold in carefully, egg yolk mixture to remaining egg white

7) pour into unlined 10" cake pan

8) drop cake pan onto table top to remove air bubbles

9) bake in preheated oven 160-170'C for 60-70min

10) overturn tin on wire rack to cool before turn back

Ganache: (adapted from Enne's)
if frosting the cake
1) melt 200g semi sweet cooking chocolate 
    with 100ml whipping cream
2) when chocolate has fully melted, stir in 20g butter