Slice bananas into about 2" circles; boil bananas with 3/4 cup of water for about 3 minutes.
Make the Banana Cake Batter:
Take the bananas out of the pot, mix the cooled water with powdered sugar until dissolved, add a tablespoon of coconut milk and stir together.
Steam the Cake:
Apply a thin layer of cooking oil to the mold, place a layer of bananas in the mold and then pour a portion of the batter to cover the bananas. Steam until the cake is clear, then repeat adding the next layer of bananas, and batter and steam until theres none left.
When the cake is completely clear, the cake is cooked. Lift the cake mold out to remove the cake.
Garnish and Serve:
Roast the peanuts and use a mortar and pestle to crush the peanuts.
Put the cake down, sprinkle peanuts and drizzle coconut milk on top and you have a delicious steamed plantain banana cake.
Notes
It is a combination of the chewy, creamy rich flavor of coconut milk and the nutty taste of roasted peanuts.