I've purchased 4 4oz bottles from different lots thinking it was just a bad batch but they all have a nasty taste to them. I've been using this flavoring since 2009 and its never tasted like this. There is no chocolate or brownie taste at all but there is a nauseating, chemical-like taste that makes me gag. I contacted Capella and they said they haven't changed their recipe so I don't know what to think. Has anyone else noticed this?