How to Create the Perfect Chocolate Drip
Break the chocolate into pieces and place in a microwavable bowl. Add the butter and melt together in the microwave in 30 second bursts stirring between each burst. You need to make sure all the chocolate is melted and the mixture is smooth.
Leave to stand for about 5 minutes to cool slightly.
Once the chocolate mixture has cooled place in a piping bag and cut off the end of the piping bag to create a small hole, making sure the chocolate does not start dripping out!
Remove your cake from the fridge and starting at the edge of the cake begin to drip the chocolate down the sides of cake, hold the piping bag in the same place to allow enough chocolate to drip down the side of the cake and then continue around the edge of the cake. Once the drip is all the way around the edge of the cake squeeze the remaining chocolate onto the top of the cake and smooth out with a palette knife if required.