Crockpot scalloped potatoes are cooked tender in the crock pot in the easiest dump-and-pour milk sauce, thinly sliced onions, and cheese. Layer these ingredients into your slow cooker and it cooks into a creamy, golden, and bubbly potato casserole! This is the way to make cheesy scalloped potatoes from scratch with no soup cans or boxed stuff! It's a quick and easy side dish to bring to a potluck or Holiday, and you can prep it ahead of time and let it slowly cook later! It's my favorite…