Place the ingredients into a dish and whisk until well combined.
Transfer the aioli to a jar or dish. Let sit for at least 30 minutes before using.
Refrigerate in a container with a tight fitting lid for up to one week.
Notes
For an exceptional flavor substitute fresh horseradish root for the bottled prepared horseradish. Peel and grated a 2-inch piece of fresh horseradish root and whisk into the aioli.