I tried my hand at Italian buttercream for the first time. It seemed simple enough. Everything was fine until I added the butter to what seemed like a very good meringue. I added the butter and it broke. But I kept on mixing and it seemed to get much worse. Finally it came together but it seems like whipped butter, rather than icing. It was far too soft and lacked that stiff but light quality, i associate with icing. I have tried to find detailed recipes to see what I might have done wrong, but there seems to be a paucity of these. I would greatly appreciate any tricks of the trade.