How long do you cook a breakfast casserole in your Crock-Pot?
If using frozen shredded hash browns, cook your crockpot breakfast casserole on low for about 5-6 hours. The edges will begin to brown, and the egg should be set.  To reiterate, when cooking overnight, put your casserole on to cook right before you go to bed. It will switch to warm once it’s done but check it as soon as you wake up.