To make a chocolate log for Christmas, you'll need some ingredients: 500g of dark chocolate, 250g of butter, 100g of sugar, 2 tablespoons of vanilla extract, 4 eggs, and a pinch of salt. First, melt the chocolate and butter together in a double boiler. Once the chocolate has melted, add the sugar, vanilla, and eggs and whisk until smooth. Pour the mixture into a lined baking tray and bake for 25 minutes at 180 degrees Celsius. Once the log is done, let it cool before dusting with icing sugar or cocoa