Prick potatoes with a fork. Bake potatoes for 1 hour or until fork tender.
When cool enough to handle, slice potatoes into bite sized chunks. Place in refrigerator until chilled, about 1 hour.
In a large bowl, combine the remaining ingredients and mix well.
Stir in the potatoes, coating each piece with the mayo mixture.
Return to refrigerator for at least one hour and serve cold. Sprinkle with additional cheddar, bacon, and green onions just before serving, if desired.
Video
Notes
The mayonnaise helps balance out all that sour cream, but you can use just sour cream if you prefer. We think the mayo gives it that potato salad vibe though.The vinegar does give this a little tangy bite, which will help cut some of the richness. You can definitely skip it for a more true loaded potato situation, but I like a little hit of acid to balance things.