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.

Jordan Lee
Jordan Lee

Head of Nutrition · June 17, 2026

Keto Sausage Egg Casserole
15 min
Prep
45 min
Cook
1 hr
Ready in
8
Servings
Easy
Difficulty

Nutrition per serving

3.1g
Net carbs
0.6g
Fiber
3.7g
Total carbs
21g
Protein
28g
Fats
358
Calories

Per serving · makes 8. Values are estimates; brands vary.

breakfastgluten freemeal preplow carbhigh protein

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. 1

    Preheat oven to 375°F (190°C) and grease a 9x13-inch baking dish with olive oil or butter.

  2. 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. 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. 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. 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. 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.

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