Make-Ahead Slow Cooker Mashed Potatoes
If you are making the potatoes the day before, stop after step 3. Allow potatoes to cool and store in the refrigerator overnight. The day you are serving the potatoes, take them out of the refrigerator for 3 1/2 hours to bring to room temperature before cooking.
Place a towel under the lid of the slow cooker to collect condensation.
Try using a liner in your slow cooker for easier cleanup