Bring water to boil in a steamer.
Place Dr. Oetker Nona Moist Cake Mix, water & egg in a large bowl, mix with an electric mixer at high speed for 3 minutes.
Add in vegetable oil, mix at low speed for 1 minute.
Place paper cups into cupcake mould, pour batter into paper cups. Steam for 10-15 minutes.
The cake is ready when a skewer inserted comes out clean.
Keep in the refrigerator if not consumed within a day. Chilled steamed moist cake tastes even better.