Traditional Chocolate Rice Layer Cake

This is one of my family's favourite cake.  Thanks to May Lau for sharing her recipe!

Ingredient A: 

7         Egg Yolks
75g     Milk
55g     Canola oil
¼ tsp   Salt
80g      Cake Flour (sifted)
15g      Cocoa Powder (sifted)

Ingredient B:
7         Egg whites
80g     Castor Sugar
½ tsp   Cream of Tartar

Buttercream:
100g    Butter
40g      Icing Sugar
½ tsp    vanilla extract

Decoration :
Chocolate Rice

Method

1. Add in milk, followed by oil and salt to the egg yolk. Mix well with each addition.
2. Add in sifted flour & cocoa powder. Mix well and set aside.
3. Beat the egg white till foamy and add in cream of tartar.
4. Add in sugar in 3 separate additions and beat till stiff peak.
5. Add 1/3 of the egg white mixture to the egg yolk mixture.
6. Pour into the remaining egg white mixture and mix well.
7. Pour the batter into a lined 12x10 inch square tray.  Smooth out.
8. Bake at 150 degree for 25-30 minutes till cooked.
9. When done, remove the cake from tray and peel off the baking paper.  Leave to cool.
10. Beat the butter, icing sugar & vanilla together.
11. Spread the buttercream on the whole cake, half the cake and stack together.
12. Sprinkle the chocolate rice over the cake and serve.