Keto Sausage Egg Breakfast Casserole

If you’re looking for a satisfying, high-protein breakfast that keeps you full for hours without the carbs, this keto sausage breakfast casserole is exactly what you need. Packed with savory sausage, fluffy eggs, and melted cheese, it delivers comfort food vibes while staying completely low-carb and gluten-free.

This dish is perfect for busy mornings, weekend brunches, or even meal prep for the entire week. You can prepare it ahead of time, bake it fresh, or reheat portions whenever needed. With simple ingredients and a rich, cheesy texture, it’s like a hearty omelet baked into a sliceable, golden casserole.

Ingredients

• 1 lb (450 g) breakfast sausage (pork or chicken)
• 10 large eggs
• 1/2 cup (120 ml) heavy cream
• 1 1/2 cups (150 g) shredded cheddar cheese
• 1/2 cup (50 g) mozzarella cheese (optional for extra melt)
• 1/2 cup (75 g) diced bell peppers
• 1/4 cup (40 g) chopped onions
• 2 cloves garlic, minced
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1/4 teaspoon paprika
• 1 tablespoon olive oil or butter
• 1 tablespoon chopped fresh parsley (optional)

Equipments

• 9×13 inch baking dish
• Large skillet
• Mixing bowl
• Whisk
• Spatula
• Measuring cups and spoons
• Knife and cutting board

Instructions

• Preheat your oven to 350°F (175°C) and lightly grease a baking dish with butter or oil
• Heat a large skillet over medium heat and add olive oil or butter
• Add chopped onions and sauté for 2–3 minutes until slightly softened
• Stir in minced garlic and cook for another 30 seconds until fragrant
• Add the breakfast sausage and cook while breaking it apart with a spatula until fully browned and no longer pink
• Drain excess grease from the skillet to avoid a greasy casserole
• Add diced bell peppers to the sausage mixture and cook for 2–3 minutes until slightly tender
• Remove the skillet from heat and allow the mixture to cool slightly
• In a large mixing bowl, crack the eggs and whisk until smooth and slightly frothy
• Pour in heavy cream and whisk again until well combined
• Add salt, black pepper, and paprika to the egg mixture and mix thoroughly
• Stir in half of the shredded cheddar cheese and mozzarella for a rich base
• Spread the cooked sausage and vegetable mixture evenly across the bottom of the greased baking dish
• Pour the egg mixture evenly over the sausage layer, ensuring it spreads into all corners
• Sprinkle the remaining cheese evenly on top for a golden crust
• Place the dish in the oven and bake for 35–40 minutes until the center is set and the top is lightly golden
• Check doneness by inserting a knife in the center; it should come out clean
• Remove from oven and let the casserole rest for 10 minutes before slicing
• Garnish with fresh parsley if desired
• Slice into squares and serve warm

Recipe Information

• Prep Time: 15 minutes
• Cook Time: 40 minutes
• Total Time: 55 minutes
• Servings: 8
• Cuisine: American
• Course: Breakfast

Nutrition Information (Approximate)

• Calories: 320 kcal
• Protein: 20 g
• Carbohydrates: 3 g
• Fat: 25 g
• Fiber: 0.5 g
• Sugar: 1 g
• Sodium: 620 mg

Flavor Profile Breakdown

• Rich and savory from sausage
• Creamy and fluffy egg base
• Cheesy and slightly sharp from cheddar
• Mild sweetness from bell peppers
• Subtle garlic aroma for depth

Tips for Best Results

• Use freshly shredded cheese for better melting
• Let eggs come to room temperature for fluffier texture
• Drain sausage well to avoid excess grease
• Don’t overbake or the casserole may become dry
• Rest before slicing to help it set properly

Variations & Substitutions

• Swap sausage with turkey, chicken, or beef
• Use spinach, mushrooms, or broccoli instead of peppers
• Replace cheddar with mozzarella, Swiss, or Monterey Jack
• Add chili flakes for a spicy kick
• Use coconut milk instead of cream for dairy-free option

Mistakes to Avoid

• Skipping pre-cooking the sausage
• Adding too much liquid which makes it watery
• Not greasing the baking dish properly
• Cutting immediately without resting
• Overloading with vegetables causing sogginess

Serving Suggestions

• Serve with avocado slices for healthy fats
• Pair with a fresh green salad
• Add hot sauce or salsa for extra flavor
• Enjoy with keto bread or low-carb toast
• Great with a side of roasted vegetables

Storage Tips

• Store leftovers in an airtight container in the fridge for up to 4 days
• Freeze individual portions for up to 2 months
• Reheat in the oven at 350°F for best texture
• Microwave for quick reheating but avoid overheating

Why You’ll Love This Recipe

• Low-carb and keto-friendly
• High in protein and very filling
• Perfect for meal prep
• Easy to customize with ingredients
• One-pan dish with minimal cleanup

How to Serve

• Slice into squares for easy portions
• Serve warm for best flavor and texture
• Top with fresh herbs or extra cheese
• Add a dollop of sour cream if desired
• Great for breakfast, brunch, or even dinner

FAQs

Can I make this casserole ahead of time?
Yes, you can assemble everything and refrigerate overnight, then bake fresh the next day.

Can I freeze this breakfast casserole?
Yes, it freezes well. Slice into portions and store in freezer-safe containers.

How do I know when it’s fully cooked?
The center should be firm and a knife inserted should come out clean.

Can I use milk instead of heavy cream?
Yes, but the texture will be slightly less rich and creamy.

Is this recipe suitable for meal prep?
Absolutely, it’s one of the best options for weekly breakfast prep.

Can I make it without cheese?
Yes, but it will be less creamy and flavorful.

What vegetables work best in this recipe?
Low-carb options like spinach, mushrooms, and peppers work great.

Can I use pre-cooked sausage?
Yes, just chop it and mix it into the casserole.

How long does it last in the fridge?
Up to 4 days when stored properly.

Can I make it spicy?
Yes, add chili flakes, jalapeños, or spicy sausage.