Keto Sausage Egg Casserole
A hearty, make-ahead breakfast bake layering savory pork sausage, fluffy eggs, and melty cheddar with sweet bell pepper and onion. At just 3.1g net carbs per serving and ready in about 1 hour, it's the ultimate keto meal-prep breakfast for busy mornings.
Head of Nutrition · June 17, 2026

Nutrition per serving
Per serving · makes 8. Values are estimates; brands vary.
This keto sausage egg casserole is a protein-packed, make-ahead breakfast that feeds a crowd or fuels a week of low-carb mornings. Sweet bell pepper and onion add color and flavor without pushing the carbs out of keto range.
Ingredients
- 1 lb ground pork breakfast sausage (sugar-free)
- 12 large eggs
- 3/4 cup heavy cream
- 2 cups shredded sharp cheddar cheese, divided
- 1 small yellow onion, finely diced (about 1/2 cup)
- 1 medium red bell pepper, diced (about 3/4 cup)
- 2 cloves garlic, minced
- 1 tsp salt
- 1/2 tsp black pepper
- 1/2 tsp smoked paprika
- 1 tbsp olive oil or butter (for greasing)
Instructions
- 1
Preheat oven to 375°F (190°C) and grease a 9x13-inch baking dish with olive oil or butter.
- 2
In a large skillet over medium heat, cook the breakfast sausage, breaking it up, until browned, about 7 minutes. Add the onion, bell pepper, and garlic and cook until softened, 4-5 minutes more. Drain excess grease and let cool slightly.
- 3
In a large bowl, whisk together the eggs, heavy cream, salt, black pepper, and smoked paprika until smooth. Stir in 1 1/2 cups of the cheddar cheese.
- 4
Spread the sausage and vegetable mixture evenly in the prepared baking dish, then pour the egg mixture over the top. Sprinkle the remaining 1/2 cup cheddar across the surface.
- 5
Bake for 35-40 minutes, until the center is set and the top is golden. A knife inserted in the middle should come out clean.
- 6
Let rest 10 minutes before slicing into 8 portions and serving.
Tips & notes
- Always check the sausage label for hidden sugar; many brands add it. Choose one with 0-1g carbs per serving to keep this fully keto.
- Store covered in the fridge for up to 4 days. Reheat individual slices in the microwave for 60-90 seconds, or freeze portions for up to 2 months.
- Swap in cooked, crumbled bacon or chopped spinach for variety, or use pepper jack for a spicier bake.
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Frequently asked questions
- How many carbs are in keto sausage egg casserole?
- Each of the 8 servings has 3.1g net carbs (3.7g total carbs minus 0.6g fiber), along with 358 calories, 21g protein, and 28g fat. The whole casserole makes 8 generous portions.
- Can I make this casserole ahead of time?
- Yes. You can assemble it the night before, cover, and refrigerate unbaked, then bake in the morning (add about 5 minutes since it starts cold). It also keeps fully baked for 4 days in the fridge and reheats beautifully.
- Can I make it dairy-free?
- You can. Replace the heavy cream with full-fat coconut milk and use a dairy-free shredded cheese. The texture is slightly softer and net carbs may shift by about 1g depending on the cheese substitute you choose.



