Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9 inch round pan.

Place flour, baking powder, salt, sugar, butter, eggs, vanilla, and milk into mixing bowl. Beat slowly to moisten, then beat with an electric mixer at medium speed for about 2 minutes until smooth. Reserve 3/4 cup batter; pour the remainder into pan.

Stir cocoa into the 3/4 cup reserved batter. Drop by spoonfuls over top of white batter. Using a knife, swirl the cocoa batter into the white batter to incorporate it in a marble effect.

Bake in preheated oven for 30 to 35 minutes, until an inserted wooden skewer comes out clean.

Now slice the cake into two layers horizontally. Drizzle some sugar syrup on both the layers and sides of the layers as well. Now Stack and frost cake layers on a greaseproof cake board, using a dab of whipped cream secure the first cake layer to the board. Spread an even layer of whipped cream between the cake layers with a large offset spatula. Spread a thin coat of frosting around the cake, to fully cover the cake layers. Smooth using a bench scraper, then chill the cake in the fridge.

To make the ganache first chop the chocolate into small pieces and put them in a dry bowl. Now heat the cream until you see bubbles on the edges (no need to boil). Then pour the warm cream over the chocolate and let it sit for 5 minutes. After 5 minutes temper the chocolate for few minutes and let it cool.

To make shredded chocolate slightly soften a 3 to 4-inch chunk of chocolate in the microwave on medium (50% power) heat. Use a vegetable peeler or knife to shredd flat, thin layers from the block of chocolate.

Now draw a line right in the middle of the cake with the edge of the long spatula. Pour the chocolate ganache on one half of the cake and stick the shredded chocolate on the other half of the cake. Now wipe all sides of the cake board with kitchen towel to clean any spilled frosting. Now keep the cake in the refrigerator for few hours to set and serve.