I can’t speak to any of this, I’ve never attempted the from scratch version. I copied the recipe and instructions just to preserve them.

The copied instructions are for the from scratch variation. The OG with premade mayo has you huck everything in there, and that’s what I typically do. I usually mix the mayo and water before I add the rest of the ingredients so I can get the consistency right, but I don’t think it would hurt anything to wait to the end. We mix it with an electric whisk just because it makes for slightly easier dishes.