Melt sugar in a pan until become caramelize then add the boiling water stir until the caramel melt then add the butter.let it cold

Mix the dry ingredients (plain flour,baking powder and baking soda (sifted)
Whisk until combine together.
Set a side

Mix the wet ingredients (egg,condensed milk and vanilla essence)
Whisk them together until combine well.

Add the dry ingredients into the wet ingredients.Mix well

Pourthe batter into a baking tin (sifted the batter when you pour them into the baking tin)

Cover and let it rest for 2 to 3 hours.

Prepare the steamer

When the water is boiling.Place the batter into the steamer.Steam in medium high heat for 30 to 35 mins.

Ready to serve