Black Forest Cake is actually a layered Chocolate cake with layers separated by Whipped cream and Maraschino Cherries and spreaded with a liquor extracted from Cherries called “Kirsch”. However in India, kirsch is substituted with Cherry syrup to make the cake non-alcoholic.
I have used Unsalted Butter and have added little salt to the mixture. In case you are using normal Salted table butter then don't add extra salt.
Since I have used Packaged Whipping Cream with added sugar, I have not added extra Sugar while whipping the Cream. In case you are using normal heavy cream to make the frosting then add 3 Tbsp. of Icing Sugar while Whipping the Cream.