This is the ultimate set-it-and-forget-it comfort food. Simple frozen hash browns transform into a decadent, crowd-pleasing casserole in your slow cooker with minimal effort, perfect for busy days or holiday meals.
For a vegetarian version, use cream of mushroom soup. Do not stir during cooking. Letting it rest after cooking is crucial for the perfect texture. Taste the mixture before adding all the salt, as the soup and cheese vary in saltiness.