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3.56 from 566 votes

Overnight Crock Pot Breakfast Casserole

Overnight Crock Pot Breakfast Casserole is perfect for a delicious, hearty and super satisfying make-ahead brunch dish everyone will love!
Course Breakfast
Prep Time 20 minutes
Cook Time 8 hours
Total Time 8 hours 20 minutes
Servings 8 -10 servings
Calories 345kcal
Author Kathryn Doherty


  • 1 lb. frozen bag hash brown potatoes diced or shredded
  • 1 cup onion diced small
  • 1 1/2 cups bell pepper any color or a mix, diced small
  • 1 lb. turkey sausage hot or mild, cooked and crumbled
  • 1 1/2 cups shredded cheddar cheese
  • 12 large eggs
  • 3/4 cup milk
  • 1 teaspoon kosher salt
  • 1/2 teaspoon black pepper
  • 1/2 teaspoon ground mustard
  • 1/4 teaspoon garlic powder
  • 1/4 teaspoon red pepper flakes optional

Topping ideas:

  • extra shredded cheese
  • diced tomatoes or salsa
  • sour cream or Greek yogurt
  • diced avocado
  • chopped green onions
  • chopped fresh cilantro or parsley
  • hot sauce


  • Place the frozen hash brown potatoes in the bottom of your slow cooker. (I don’t use cooking spray but you can if you’re worried yours might stick.)
  • Place the chopped onion and peppers on top of the potatoes.
  • Next, layer the cooked sausage in the crock pot and top with the shredded cheese.
  • In a medium bowl, whisk together the eggs and remaining ingredients (but not the toppings).
  • Pour the egg mixture over the other ingredients in the slow cooker.
  • Put the lid on and cook for 8-9 hours on low.
  • Serve with desired toppings and enjoy!


If you are using thawed hash brown potatoes, this will probably cook in 7-8 hours.
You can substitute pork sausage if you prefer. You could also replace the sausage with diced ham or cooked, crumbled bacon.
I use skim or 2% milk, but you could use a milk substitute or use half-and-half for a richer dish.
The toppings are optional but really help make this casserole look gorgeous and bring a bright, fresh taste as well.


Calories: 345kcal | Carbohydrates: 15g | Protein: 26g | Fat: 19g | Saturated Fat: 8g | Cholesterol: 312mg | Sodium: 877mg | Potassium: 540mg | Fiber: 1g | Sugar: 3g | Vitamin A: 1540IU | Vitamin C: 43.1mg | Calcium: 239mg | Iron: 2.7mg