I am making a 3 layer 10" round sponge cake filled with buttercream and decorated with the vertical pleat/ruffle type buttercream decoration. I know this kind of decor takes an awful lot of buttercream, but I wish I could find somewhere that helps you work it out exactly. When I have done this in the past I always seem to make too little and end up having to make a dash to the shops to buy more butter and make another batch!
I am making the classic buttercream - butter, icing sugar, water & vanilla.
Any ideas anyone? Or has anyone made this kind of cake that would know how much I need?