Start by gathering all your ingredients together on your workspace.

Ensure you have everything needed before starting.

In a medium-sized mixing bowl, combine the horseradish, sour cream, Dijon mustard, and mayonnaise.

Use a spoon or spatula to mix these ingredients until they are thoroughly blended.

Add the chopped chives to the mixture.

Stir them in gently, making sure they are distributed evenly throughout the sauce.

Taste the sauce and adjust any seasonings as needed.

You can add a bit more horseradish for extra heat, if desired.

Transfer the sauce to a jar or container with a lid.

Refrigerate the sauce for at least an hour before serving.

Your delicious horseradish sauce is complete!