Steamed chinese sponge cake

Name: Steamed chinese sponge cake
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 8
Cuisine: En
Ingredients: (A); 1. 5 Eggs (I used B size), 4 nos if you are using large A eggs; 2. 100g Castor Sugar; 3. 1 tsp Ovalett 黄油; --------------------------------------------------------------------------; 4. 1 tsp pure Pandan leaves juice (for Pandan flavour); (B) Sifted; 1. 120g Superfine Flour; 2. 20g Self-Raising Flour; 3. 1/2 tbsp Double Action Baking Powder; (C); 1. 40ml Coconut Milk; (You may use 40ml of Ice Cream Soda / Orange bicarbonate drink to substitute if you do not like coconut milk for plain flavour.