Easy Chocolate Moist Cake

Here are the recipe and watch the video for the step by step guide.
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Music credit: https://www.bensound.com
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Ingredients:

Chocolate frosting:
2 cups Milk
3/4 cup Sugar
1/2 cup Cocoa powder
2 tbsp All purpose flour
80g Butter

Chocolate Sponge Cake:
2 cups - All purpose flour
2/3 cup - Cocoa powder
1 1/2 cups - Sugar
1 tsp - Salt
3/4 tbsp - Baking powder
1 tsp - Baking soda
1 cup - Milk
1/2 cup - Vegetable oil
2 tsp - Vanilla extract /or essence
3 pcs - Egg
1 cup - Boiling water (for coffee)
2 tsp - Coffee
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Bake at 347F /175C for 40mins