Mustard is a commonly used condiment. Unfortunately, very few people know whether mustard does go bad. You should know that it’s very unlikely that mustard will go bad because it doesn’t contain any ingredients that spoil. Nevertheless you should always store this condiment properly so you can avoid most unpleasant situation. Those situation can be: separated or dried out mustard. Although the two mentioned conditions are reversible, you should aim in proper storage, to maintain the freshness and great taste that mustard provides.