For a smoother sauce, use full-fat sour cream. Light sour cream can also be used, but the texture will be slightly thinner. The heat level of prepared horseradish can vary. Start with 3 tablespoons and add more to achieve your desired level of spiciness. Feel free to experiment with different hot sauces to add a unique twist to the sauce. A smoky chipotle sauce or a tangy vinegar-based sauce would be delicious additions. This sauce can be made up to 2 days in advance. Store it in an airtight container in the refrigerator.