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A hearty, delicious and full of flavor way to start the day, this Easy Breakfast Casserole is packed with protein, veggies, and cheesy goodness. This is a Keto breakfast casserole, which also happens to be Low-Carb and Gluten free.
Looking for more casserole recipes? You may also like this Low-Carb Cauliflower Casserole, Cabbage Casserole or Lazy Cabbage Roll Casserole.
Whether you’re meal-prepping for the week, feeding a hungry family, or serving a crowd for brunch, this recipe is an effortless way to enjoy a warm, satisfying breakfast. Great for a weekend, holiday or Christmas morning breakfast idea.
Why This Recipe Works
This breakfast casserole is a winner for so many reasons! It’s simple to prepare, requires minimal ingredients, and is packed with protein to keep you full all morning.
The combination of eggs, sausage, and cheese ensures a rich, flavorful dish, while the bell peppers and green onions add a fresh, slightly sweet crunch.
It’s easy to customize with your favorite add-ins or make ahead for stress-free, slow mornings. And unlike many breakfast casseroles, this recipe contains no tater tots or hash browns, making it a lighter and lower-carb option while still being hearty and filling.
Why You’ll Love This Egg Casserole Recipe
- Effortless & Quick – Minimal prep time makes this a great choice for busy mornings.
- Budget-Friendly – Uses simple, affordable ingredients that feed a crowd. This is important to me as a home cook.
- Protein-Packed – Loaded with eggs and sausage for a satisfying and nourishing breakfast.
- Crowd-Pleaser – Perfect for brunch gatherings, potlucks, or holiday mornings.
- Make-Ahead Friendly – Can be prepared the night before and baked fresh in the morning.
- Customizable – Easily swap in different proteins, veggies, or cheeses to suit your taste.
- No Potatoes Needed – Unlike many breakfast casseroles, this version is free from tater tots, brown potatoes or hash browns, making it a great lower-carb choice.
What You’ll Need
Ingredients:
- 2 pounds pork sausage
- 12 large eggs
- 1 cup sour cream (light or regular)
- 1/4 cup milk
- 1-2 teaspoons salt (to taste)
- 1/2 teaspoon ground black pepper
- 4 green onions, chopped
- 1/2 orange bell pepper, diced
- 1/2 red bell pepper, diced
- 2 cups shredded cheddar cheese
How to Make Easy Breakfast Casserole
- Preheat the oven – Set your oven to 350°F (175°C) and grease a 9×13-inch baking dish with cooking spray.
- Prepare the egg mixture – In a large bowl, whisk together the eggs, sour cream, milk, shredded cheese, salt, and pepper until well combined.
3. Cook the sausage – In a large skillet over medium heat, cook the pork sausage until browned, breaking it into crumbles with a wooden spoon. Drain excess grease and transfer the sausage to the bowl with the egg mixture.
4. Sauté the vegetables – Using the same skillet, cook the bell peppers and green onions for 2-3 minutes until slightly softened. Add them to the egg mixture and stir everything together.
5. Bake – Pour the mixture into the prepared baking dish and bake for 35-50 minutes, or until the edges are set and the center is slightly jiggly.
6. Serve – Allow the casserole to cool slightly before slicing and serving. Enjoy!
Veggie Add-Ins
Want to boost the nutrition and flavor? Try adding these vegetables:
- Spinach – Stir in fresh or thawed frozen spinach for extra greens.
- Broccoli – Finely chopped, lightly steamed broccoli adds texture and nutrients.
- Mushrooms – Sautéed mushrooms provide a rich, umami flavor.
- Zucchini – Grated or diced zucchini blends in seamlessly.
- Potatoes – If you prefer, add shredded or diced potatoes for extra heartiness.
Simply mix your favorite add-ins into the egg mixture before baking!
What to Serve With Breakfast Casserole
Pair this breakfast casserole with:
- Toast or Biscuits – Serve with warm buttered toast or flaky biscuits.
- Crispy Breakfast Potatoes – Roasted or pan-fried potatoes complement the dish beautifully.
- Fresh Salsa – A spoonful of salsa or hot sauce adds a bright, zesty kick.
- Side Salad – A simple green salad with a tangy vinaigrette balances out the richness.
- Fresh Fruit – Serve with a side of berries, melon, or citrus for a refreshing contrast.
Recipe Tips
- Use Different Cheeses – Swap cheddar for mozzarella, pepper jack, or feta for a fun twist.
- Try Other Proteins – Use cooked bacon, ham, or turkey sausage instead of pork sausage.
- Make It Spicy – Add diced jalapeños, red pepper flakes, or a dash of hot sauce for extra heat.
- Dairy-Free Option – Substitute sour cream with dairy-free yogurt and use a non-dairy cheese alternative.
- Meal Prep Friendly – Store leftovers in the fridge for up to 4 days or freeze individual portions for quick breakfasts.
Storage Tips
- Refrigerate Leftovers – Store the cooled casserole in an airtight container in the refrigerator for up to 4 days.
- Freeze for Later – Cut into individual portions, wrap tightly in plastic wrap, and store in a freezer-safe container for up to 3 months. Thaw overnight in the fridge before reheating.
- Reheat with Ease – Warm individual slices in the microwave for 30-60 seconds, or reheat in a 325°F (163°C) oven until heated through.
More Easy Breakfast Recipes
Looking for more easy, delicious breakfast ideas? Try these:
- Easy Overnight Oats – an effortless, nutritious and delicious breakfast idea. You need to try this easy overnight oats recipe.
- Lemon Ricotta Pancakes – flavorful, easy to make and perfectly paired with fresh berries and pure maple syrup.
- Cilbir Eggs – Poached Eggs In Yogurt – light, simple and delicious meal made with poached eggs, over yogurt and topped with buttery sauce with paprika and garlic.
This easy breakfast casserole is sure to become a family favorite!
Whether you’re making it for a special occasion or a simple weekday breakfast, it’s a reliable, satisfying dish that everyone will love.
Easy Breakfast Casserole
Video
Ingredients
- 2 pounds pork sausage
- 12 eggs
- 1 cup sour cream, light or regular
- 1/4 cup milk
- 1 teaspoon kosher salt
- 1/2 teaspoon ground black pepper
- 4 green onions, chopped
- 1/2 orange bell pepper, diced
- 1/2 red bell pepper, diced
- 2 cups shredded cheddar cheese
Instructions
- Preheat the oven – Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with cooking spray.
- Prepare the egg mixture – In a large bowl, combine the eggs, sour cream, milk, shredded cheese, salt, and pepper. Mix on low speed with an electric mixer until just combined.
- Cook the sausage – Heat a large skillet over medium heat. Add the pork sausage and cook until browned, breaking it into small pieces with a wooden spoon. Drain excess grease and transfer the sausage to the bowl with the egg mixture.
- Sauté the vegetables – In the same skillet, sauté the bell peppers and green onions for 2-3 minutes. Add them to the bowl with the egg mixture and stir to combine.
- Bake – Pour the mixture into the prepared baking dish. Bake for 35-50 minutes, until the edges are set and the center is just slightly jiggly.
- Serve – Let the casserole cool slightly before slicing and serving.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
