Many a time, you might have come across the term 'prepared mustard', as one of the ingredients in food recipes. Even though mustard is commonly used in various forms, the term 'prepared mustard' may confuse you. It is nothing other than ground mustard seeds mixed with other ingredients, like water, wine, vinegar, beer, and juice. There is a wide range of prepared mustard types available in supermarkets. However, preparing it at home is very easy, provided, you know the right recipes.