HI. I am having real trouble with my Wilton 2d nozzle. It is piping the buttercream so that it comes through the nozzle 'shredded' where the ridge edges are. I hope that makes sense. I use double icing sugar to unsalted butter, vanilla essence and a little milk. I electric mix for 5 mins or so (maybe not quite so long). Am i doing something wrong, do I need a new nozzle, or could my buttercream mix be perfected (I'm not overly sure about using shortening in it)
Maybe there is something glaringly obvious I'm doing wrong that is staring me in the face?????