Some substitutes for spicy brown mustard include horseradish, turmeric and chili peppers. Most mustard varieties are interchangeable in recipes, although this may alter the end result slightly.
Prepared mustards are made from ground mustard seeds combined with an assortment of spices and flavorings and an acid, such as vinegar or alcohol. Precise seasoning varies from brand to brand, so there are many potential flavor profiles of spicy brown mustard. This makes it an easy condiment to substitute.
Spicy brown mustard is bolder and more flavorful than milder yellow mustard. It is known for its heat and bite. A good substitute should be able to create the same kind of heat. Horseradish has an intense flavor that works well. If it is only the taste of spicy brown mustard that needs substituting, simply adding prepared horseradish or grinding fresh horseradish root into the recipe will work. If the consistency is desired as well, the horseradish can be added to sour cream.
Some types of mustard are interchangeable in certain recipes. Substituting Dijon mustard, for example, which has a sharp flavor similar to spicy brown, is a good option. Spices such as chili peppers, turmeric and garlic salt can be added to yellow mustard to make it hotter. Allspice, cinnamon, ginger and nutmeg can help round out the flavor. When switching mustards, it is important to keep in mind the end result will not taste exactly true to the recipe. But this can lead to fun experimentation and new discoveries.