This slow cooker hash brown casserole recipe is easy to make with frozen (thawed) hash brown potatoes, cheese, sour cream, and other ingredients. And the slow cooker makes for nearly hands-free preparation. This is the perfect side for any meal but especially those "Breakfast-for-dinner" Meals. Just assemble the ingredients in the crock pot four hours before you plan to eat, and, by supper time, you have hash browns to go with your eggs and bacon or waffles and sausage. Consider this dish for a brunch or buffet line because they will hold up well to the heat and won't dry out.