Prep the Potatoes: Place your cubed potatoes into a 6-quart slow cooker.
Season: Sprinkle the dry onion soup mix (or Parmesan) over the potatoes.
The “Dump”: Pour the entire bottle of Italian dressing over the top. Toss everything gently with a large spoon to ensure every potato is coated.
Cook: Cover and cook on High for 4 hours or Low for 7–8 hours until the potatoes are fork-tender.
Finish: Give them one final stir before serving to redistribute the juices that settle at the bottom.
Quick Tips for Success
Don’t add water: It’s tempting, but the dressing and the moisture from the potatoes provide plenty of liquid. Adding water will make them mushy rather than “roasted.”
Crispy edges: if you want a bit of a crust, prop the lid open slightly during the last 30 minutes of cooking to let some steam escape.
Garnish: A sprinkle of fresh parsley or extra black pepper right before serving makes this look like a gourmet side dish.