Chocolate Swiss Roll Cake: the decadent recipe for a fluffy double chocolate dessert

Chocolate Swiss Roll Cake 80ml milk chocolate 100ml milk 60ml Oil 8 yolks 80g sugar 120g Cake flour 40g Cocoa Powder 5g baking powder 8egg whites 60g sugar Pan size 18x 13cm 7.5cm high Bake on a preheated oven 175c 18min Syrup 30g sugar 50ml water 8g rum Chocolate whipped cream 110g milk chocolate 54.5% (couverture) 110g heavy cream (to melt the chocolate) 350g cold heavy cream Chocolate Frosting Ingredients unsalted butter room temperature 400g cocoa powder 50g dark chocolate 130g melted ¾ teas