I guess Indonesia is the only country in the world that knows a cake called Brownies Kukus or literally mean Steam Brownie in English. The name steam Brownie actually came from a bakery at Bandung named Amanda, that become very famous because of the cake.
Why they called it Steam Brownie? I guess becoz the cake has very strong chocolate taste unlike any other steam cake just like baked brownie compare to other baked cake. Or for marketing purpose .... ;p, you know Bandung already famous for the bake brownie so it easier to sell a cake with the similar name, and the word "steam" will bring customer to curiosity. Well maybe you can ask the owner if had a change to go to Bandung ... ;p
So, coz the popularity of the cake some people start to crate a recipe for the cake such as Teh Uceu & Ny. Liem. Below is the recipe created by Teh Uceu.
8 whole eggs
350 gr of sugar
1 tbs of cake emulsifier
Sift the dry ingredient:
200 gram of cake flour
90 gram of cocoa powder
Mix wet ingredient together:
1/2 can of condensed milk or about 170 gram.
250 cc of vegetable oil
200 cc of water
100 gram of rice chocolate
Beat eggs, sugar & cake emulsifier until it goes very thick and light. Fold in sifted dry ingredients until blended. add wet ingredient gradually, fold. Pour 1/2 batter in to a 24x24cm pan greased with oil, lined with baking paper on base & sides. Steam for 15 minutes, sprinkle with the rice chocolate, & add the rest of the batter, steam again for 25-30 minutes.
This cake is suitable for you that doesn't have any oven, can be used also for base cake of chocolate devil, your black forest cake, or any other cake that use chocolate cake ...