Devil's Food Cheesecake

Name: Devil's Food Cheesecake
Prep time: 2 h
Cook time: 2 h
Total time: 4 h
Cuisine: American
Ingredients: 3 (225g) packages cream cheese (use only full fat), at room temperature; 265g granulated sugar; 25g cornflour; 1 tbsp pure vanilla essence; 2 extra-large eggs; 160ml double cream; 225g sifted flour; 2 tsps baking powder; 1/2 tsp salt; 170g unsalted butter, at room temperature; 200g granulated sugar; 100g firmly packed dark brown sugar; 3 extra-large eggs, separated; 115g dark or milk chocolate, melted and cooled; 350ml whole milk; 1/2 tsp cream of tartar; 680g sifted icing sugar; 45g unsweetened cocoa powder; 340g unsalted butter, at room temperature; 170g dark or milk chocolate, melted and cooled; 45g dark corn syrup; 2 tbsp pure vanilla essence; 120ml double cream; 340g dark or milk chocolate, shaved into large chocolate curls (see below)