Alton Brown's horseradish cream sauce on the Food Network serves as a good horseradish sauce recipe. The recipe yields 1 1/4 cups of sauce and takes 10 minutes to prepare.
To prepare the recipe, place 1 cup sour cream, 1 tablespoon Dijon mustard, 1 teaspoon white vinegar and 1/4 cup fresh, grated horseradish into a mixing bowl. Also add 1/4 teaspoon freshly ground black pepper and 1/2 teaspoon kosher salt. Whisk all the ingredients until the mixture has a smooth, creamy consistency. Leave the sauce in the refrigerator overnight or for a minimum of four hours to help the flavors blend. If you don't plan on using it immediately, store the sauce in an airtight container in the refrigerator for up to two to three weeks.
Serve this sauce with a holiday roast beef, corned beef, filet mignon or smoked prime rib. Alternatively, use it as a filling for roast beef sandwiches. For a milder sauce, cut back on the vinegar and mustard. If you don't have white wine vinegar on hand, red wine vinegar and apple cider vinegar work in a pinch. For a stronger horseradish taste, try adding some extra shredded horseradish, or toss in some wasabi for a spicier flavor.