Keto Breakfast Casserole: A Hearty Low-Carb Game Changer

Delicious keto breakfast casserole, a hearty low-carb dish, ready to serve.
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January 17, 2026

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How to make Keto Breakfast Casserole

Making a delicious Keto Breakfast Casserole is straightforward and rewarding. This hearty dish is perfect for families or meal prep. Below are the ingredients and directions to create a satisfying breakfast that’s low in carbohydrates yet high in flavor.

Ingredients:

  • 2 tablespoons Olive Oil (You can use avocado oil for a richer taste.)
  • 1 cup Bell Peppers (Any variety works, or you can omit.)
  • 1 medium Onion (Yellow or white onions are perfect.)
  • 8 large Eggs (Egg substitutes can be used for a vegan alternative.)
  • 1 cup Cheddar Cheese (Mozzarella is a great substitute.)
  • 1 medium Delicata Squash (Can substitute with butternut squash, zucchini, or turnips.)
  • 1 pound Breakfast Sausage (Pork or turkey adds hearty protein.)
  • 1 teaspoon Salt (Adjust according to taste.)
  • 1 teaspoon Paprika (Smoked paprika can enhance the flavor.)
  • 1 teaspoon Sage (Provides herby freshness.)
  • 1/2 teaspoon Black Pepper (Freshly ground for the best flavor.)
  • 1 teaspoon Thyme (Fresh thyme can elevate the taste.)
  • 1/4 teaspoon Cayenne (Use carefully for heat.)

Directions:

  1. Preheat the Oven: Begin by preheating your oven to 375°F (190°C). This ensures that your casserole cooks evenly.

  2. Prepare the Vegetables: In a skillet, heat olive oil over medium heat. Add the chopped bell peppers and diced onion. Sauté for about 5–7 minutes until they become soft and translucent.

  3. Cook the Sausage: Add the breakfast sausage to the skillet. Break it apart with a spatula, cooking until it is browned and cooked through. This usually takes 8–10 minutes. Make sure to drain excess grease if needed.

  4. Mix the Eggs: In a large bowl, crack the eggs. Add salt, paprika, sage, black pepper, thyme, and cayenne. Whisk the mixture until everything is well blended.

  5. Combine Ingredients: Add the cooked sausage and sautéed vegetables to the egg mixture. Then, fold in the shredded cheddar cheese and diced delicata squash. Mix everything gently until combined.

  6. Transfer to Baking Dish: Lightly grease a 9×13 inch baking dish with a little olive oil. Pour the mixture into the dish, spreading it evenly.

  7. Bake: Place the casserole in the preheated oven. Bake for 25–30 minutes, or until the center is set and the top is golden brown. You can check for doneness by inserting a knife in the center; it should come out clean.

  8. Cool and Serve: Allow the casserole to cool for a few minutes before slicing it into squares. Serve warm, and enjoy!

Why You’ll Love This Keto Breakfast Casserole

The Keto Breakfast Casserole is a fantastic option for anyone looking to maintain a low-carb lifestyle. It combines flavorful ingredients into a single dish, making breakfast enjoyable and hassle-free.

This dish is not just about being low in carbs. It’s also packed with nutrients. Eggs provide high-quality protein, while the sausage adds a rich taste and additional protein. The bell peppers and delicata squash contribute fiber, vitamins, and minerals, making this casserole nutritious and filling.

Nutriment Benefits

  • Eggs: A great source of protein and rich in vitamins, particularly vitamin D and B12.
  • Cheese: Provides calcium and contributes to a good flavor.
  • Sausage: Offers hearty protein and can vary in fat content depending on the type (pork or turkey).
  • Vegetables: Bell peppers and squash are low in calories yet contain beneficial antioxidants and vitamins.

What to Serve With Keto Breakfast Casserole

Keto Breakfast Casserole pairs beautifully with various side dishes. Here are some ideas:

  • Avocado Slices: Creamy avocados add healthy fats to your meal.
  • Greek Yogurt with Berries: This can create a balanced breakfast with protein and sweetness.
  • Low-Carb Toast or Muffins: A slice of low-carb bread or muffin complements the casserole well.
  • Green Salad: A light mixed salad can balance the meal with freshness.

How to Store Keto Breakfast Casserole

Storing the Keto Breakfast Casserole is simple and convenient:

  • Refrigerator: Allow leftovers to cool completely. Store in an airtight container in the refrigerator for up to 4 days.
  • Freezer: For long-term storage, wrap the casserole tightly in foil or plastic wrap and place it in the freezer. It can last up to 2 months. When ready to eat, thaw it overnight in the refrigerator before reheating.

Tips and Mistakes to Avoid

  • Avoid Overcooking: Be careful not to overcook the sausage as it can become dry. Cook it just until it browns.
  • Don’t Skimp on Seasonings: Seasoning is key to flavor. Adjust the herbs and spices according to your taste preferences.
  • Cut Uniformly: For even cooking, chop your vegetables into uniform pieces.
  • Check Doneness: Always check the casserole for doneness in the center before serving to ensure that the eggs are completely cooked.

Variety

This recipe is versatile! You can adjust it based on your preferences or the ingredients available. Consider these variations:

  • Vegetarian Option: Omit the sausage and add more vegetables such as spinach, mushrooms, or zucchini for a tasty vegetarian casserole.
  • Different Cheeses: Try mixing different cheeses like feta or pepper jack for a flavor twist.
  • Add Spices: Experiment with different herbs and spices, such as oregano or chili flakes, for an exciting kick.

FAQs

1. Can I prep this casserole ahead of time?

Yes! You can prepare the casserole the night before. Simply assemble it in the baking dish, cover it with foil, and refrigerate. Bake it in the morning for a delicious breakfast.

2. Is this casserole suitable for meal prep?

Absolutely! This casserole stores very well, making it a fine option for meal prep. You can prepare it in advance and portion it for easy breakfasts throughout the week.

3. Can the ingredients be swapped for something else?

Yes! You can swap the delicata squash for zucchini or butternut squash, and the breakfast sausage for turkey sausage or bacon. Just be mindful of cooking times for different ingredients to ensure everything is perfectly cooked.

Enjoy your cooking and have a delicious breakfast with this Keto Breakfast Casserole! It’s a filling meal that everyone will love.

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Keto Breakfast Casserole


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  • Author: mealstomake
  • Total Time: 45 minutes
  • Yield: 8 servings 1x
  • Diet: Keto

Description

A hearty and satisfying breakfast casserole that is low in carbohydrates and high in flavor, perfect for families or meal prep.


Ingredients

Scale
  • 2 tablespoons Olive Oil
  • 1 cup Bell Peppers
  • 1 medium Onion
  • 8 large Eggs
  • 1 cup Cheddar Cheese
  • 1 medium Delicata Squash
  • 1 pound Breakfast Sausage
  • 1 teaspoon Salt
  • 1 teaspoon Paprika
  • 1 teaspoon Sage
  • 1/2 teaspoon Black Pepper
  • 1 teaspoon Thyme
  • 1/4 teaspoon Cayenne

Instructions

  1. Preheat your oven to 375°F (190°C).
  2. In a skillet, heat olive oil over medium heat. Add chopped bell peppers and diced onion, and sauté for 5–7 minutes until soft.
  3. Add the breakfast sausage to the skillet. Cook until browned, about 8–10 minutes, and drain excess grease if needed.
  4. In a large bowl, crack the eggs and add salt, paprika, sage, black pepper, thyme, and cayenne. Whisk until well blended.
  5. Combine the cooked sausage and sautéed vegetables with the egg mixture. Fold in shredded cheddar cheese and diced delicata squash.
  6. Grease a 9×13 inch baking dish with olive oil and pour the mixture into the dish, spreading it evenly.
  7. Bake for 25–30 minutes or until the center is set and the top is golden brown. Check doneness with a knife in the center.
  8. Allow to cool for a few minutes before slicing into squares. Serve warm.

Notes

This casserole is versatile; feel free to adjust ingredients based on your preferences. You can substitute vegetables or meats as needed.

  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Category: Breakfast
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 serving
  • Calories: 350
  • Sugar: 2g
  • Sodium: 700mg
  • Fat: 25g
  • Saturated Fat: 10g
  • Unsaturated Fat: 15g
  • Trans Fat: 0g
  • Carbohydrates: 8g
  • Fiber: 2g
  • Protein: 20g
  • Cholesterol: 300mg

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