Spray a large crockpot with nonstick spray.
Place all the ingredients in a large slow cooker. Stir to combine slightly. While the potatoes are cold they won't coat completely and that's totally fine.
Add the following seasoning for the Garlic Ranch Potatoes
3 pounds red potatoes, 2 tablespoons olive oil, 1 ounce ranch seasoning, 1 tablespoon chopped fresh chives, 1 tablespoon minced garlic, kosher salt and freshly ground black pepper
Add the following seasoning for the Spicy Taco Potatoes
3 pounds red potatoes, 2 tablespoons salted butter, 1 ounce taco seasoning, 2 tablespoons olive oil, 2 tablespoons salted butter, 1 tablespoon crushed red pepper flakes, Kosher salt and freshly ground black pepper
Cook on high for 3-4 hours or until the potatoes are fork tender. (NOTE: Check the potatoes after 1 hour and stir to make sure all the potatoes are coated fully. Check again after 2½ hours and make sure they aren't done. Depending on the size of the potatoes, they could cook a bit quicker).