In a mixing bowl, combine the sour cream, prepared horseradish, mayonnaise, Dijon mustard, and lemon juice.
Whisk the ingredients together until the mixture is smooth and well combined.
Taste the sauce and add salt and black pepper as needed to adjust the seasoning to your preference.
Chill the sauce in the refrigerator for at least 30 minutes to allow the flavors to meld.
Serve the creamy horseradish sauce as a condiment with roasted meats, seafood, or as a dip for fresh vegetables.
For a spicier sauce, you can increase the amount of prepared horseradish to your liking.
This sauce can be stored in an airtight container in the refrigerator for up to one week.
Feel free to customize the sauce by adding minced garlic or fresh herbs for added flavor.