Combine everything except baking powder and ingredients for the filling in a bowl. Set aside for 30 minutes - 1 hour.
Add in baking powder. Mix and set aside for another 10 minutes.
Heat the mold pan and pour the batter approximately 1/2 full. Close the lid and cook with low heat.
Once the hole appears on the surface of the cake, add the fillings and pour the batter until it is 3/4 full. Close the lid and continue cooking until the cake is dry or fully cooked for about 5 minutes; then remove it from the heat.