New answers tagged botulism
3 days if not refrigerated. 14 days in a fridge. Freezing is not recommended.
Unlike oil, butter isn't pure fat. Typically, it's around 80% fat in an emulsion with roughly 20% water and dissolved milk solids. So, no, it's not a truly anaerobic environment. If it were melted or clarified, it may be a different story. Furthermore, butter's crystaline structure -- at room temperature and below -- is bound to be aerated to some degree ...
Top 50 recent answers are included