Grease the inside of the crockpot with the butter.
Place the prepared potatoes inside of the crockpot, then pour the vegetable broth over them.
Cook on low all day, or on high for 3-4 hours.
When the potatoes are ready and YOU are ready, mash them with a potato masher. Add in enough milk to make them creamy, then place into your casserole of choice. Top with the toppings in your preferred order.
Place on table and let everyone spoon out their portions.