Some mornings call for something hearty, satisfying, and made to share—and that’s exactly why I love a good breakfast casserole. Whether you’re feeding a hungry crowd, meal-prepping for the week, or just want to enjoy a warm, cheesy bite of comfort first thing in the morning, this recipe has you covered.
I first made this on a lazy Sunday when I had leftover sausage, eggs, and a loaf of bread that needed to be used up. I tossed everything into a baking dish, added some cheese (because, obviously), and let the oven do its thing.
What came out? A golden, bubbling casserole packed with flavor—crispy edges, fluffy eggs, and that perfect balance of savory goodness.
The best part? It’s incredibly versatile. You can switch up the proteins, add veggies, or keep it classic. And if you’re in the mood for something lighter, try a bowl of breakfast oatmeal for a well-rounded start to the day.
Whether it’s for holiday brunches, weekend mornings, or meal-prep magic, this breakfast casserole is a must-make.
Why You Will Be Hooked?
- Feeds a Crowd: Perfect for family gatherings or weekend brunch.
- Make-Ahead Friendly: Assemble the night before and bake in the morning.
- Endlessly Customizable: Swap in your favorite meats, cheeses, or veggies.
- Satisfyingly Hearty: A balanced mix of protein, carbs, and cheesy goodness.
- Crispy, Cheesy Perfection: That golden top layer is everything!
Breakfast Casserole Recipe
Equipment
- Slow cooker
- Large skillet
- Whisk
- Mixing bowl
- Cooking spray
Ingredients
- cooking spray
- 1 26 ounce package frozen hash brown potatoes, thawed
- 12 eggs beaten
- 1 cup milk
- 1 tablespoon ground mustard
- salt and ground black pepper to taste
- 1 16 ounce package maple-flavored sausage
- 1 16 ounce package shredded Cheddar cheese
Instructions
- Spray the slow cooker with cooking spray.
- Spread thawed hash browns evenly in the slow cooker.
- In a bowl, whisk together eggs, milk, mustard, salt, and pepper.
- In a skillet, cook sausage until browned, then drain the grease.
- Layer cooked sausage over hash browns, followed by shredded cheese.
- Pour the egg mixture over the layers in the slow cooker.
- Cover and cook on Low for 6 to 8 hours.
- Serve warm and enjoy!
Nutrition Info:
| Nutrition | Value |
| Calories | 641kcal |
| Carbohydrates | 21g |
| Protein | 36g |
| Fat | 54g |
| Sugar | 3g |
| Sodium | 989mg |
Expert Tips for a Perfect Slow Cooker Breakfast Casserole!
- Use Well-Drained Hash Browns – Thawed hash browns can release excess moisture, making the casserole soggy. Pat them dry with a paper towel before layering to keep the texture firm.
- Brown the Sausage Well – Cook the sausage until deeply browned to enhance its flavor. Draining the grease prevents an overly oily casserole.
- Even Cheese Distribution – For a gooey, melty texture throughout, layer half the cheese with the sausage and sprinkle the rest on top before adding the eggs.
- Whisk the Eggs Thoroughly – Beating the eggs, milk, mustard, salt, and pepper well ensures a smooth, uniform custard. For extra fluffiness, add a splash of heavy cream or half-and-half.
- Prevent Overcooking – Slow cookers vary, so check after 6 hours. The casserole is done when the eggs are set and no longer runny in the center.
- Customize the Flavor –
- Swap the sausage for bacon or chorizo for a different twist.
- Add sautéed onions, bell peppers, or spinach for extra flavor and color.
- Stir in a pinch of paprika or hot sauce for a slight kick.
- Crispier Edges Hack – If you love crispy edges, remove the lid during the last 30 minutes or broil the cooked casserole in the oven for 3-5 minutes.
- Perfect for Meal Prep – Let leftovers cool completely before storing them in an airtight container. They reheat well in the microwave or oven for an easy breakfast throughout the week.
Joe Miller is the passionate founder of Food Landscape Insight, where he shares his love for cooking and culinary experiences. Growing up in a family-run diner, Joe was immersed in the vibrant world of food from an early age. The kitchen became his canvas, and food, his way of storytelling.
Through years of experimentation and learning, Joe honed his skills and started his blog to inspire others to embrace the joy of cooking. Each recipe he shares is a blend of tradition, creativity, and the heartfelt memories that food brings to life, all with the aim of fostering a deeper connection to food.
