Mix black forest mix and other ingredients in a bowl and mix well using a beater.
Greease pan and pour this mixture to pan.
preheat oven at 180°c for 5 minutes
bake cake for 35 minutes at 180°c in convection mode
Insert a tooth pick and check whether smoothly comes out, if not bake again
cool cake for 30 minutes
Mix whipping powder and milk in a bowl
Decorate cake with wipping cream
Beat for 5-7 minute and place that wipping cream in freezer for 15- minutes
Decorate cake with wipping cream