Ayeshaji's chocolate cake topping

1 tbsp Butter
2 Egg Yolks
1 cup Icing Sugar
1 tsp Vanilla Essence
1/2 cup Coco Powder
Milk

• Melt the butter, and cool slightly before whipping in the egg yolks.
  

• Add the icing sugar, coco, and vanilla essence, mixing well.

• Slowly add milk, until desired consistency is achieved.

This topping may be cooked as well. The recipe will remain the same, except, instead of a bowl, it will be mixed in a sauce pan over a low flame.