Mix the warm water with cocoa powder and melted margarine.

Bring the steamer to a boil.

Beat the egg and sugar until the sugar dissolves.

Add the sifted flour to the egg mixture and then add the cocoa mixture.

Pour into a mold that has been greased with margarine and lightly floured.

Steam for 4 minutes, depending on the size of the mold. Do not steam too long to ensure it remains a lava cake and does not turn into brownies.