Healthy Low Carb Keto Breakfast Casserole Recipe

Need a healthy breakfast? This Keto Breakfast Casserole is great for meal planning and gives you a low-carb, easy breakfast to start your day off right!

Breakfast can be such a challenging meal to fit into busy mornings.

And I, Rebecca of Good Thing Baking, love recipes like this Keto Breakfast Casserole that makes breakfast simple, delicious, and healthy.

It’s low carb and contains several cups of veggies, making it a much healthier option than grabbing a bowl of cereal or bagel!

The breakfast casserole also reheats well, making it a great meal prep option for making ahead and then reheating in the morning.

And though I have a sweet tooth, I typically prefer savory breakfast options like this keto casserole or a healthy oatmeal breakfast bowl or Sriracha bacon and egg cupcakes!

ingredients used to make keto breakfast casserole

Ingredients needed to make a Keto Breakfast Casserole

14 large eggs — If you are using a different size of egg, you’ll need about 2 ½ cups of eggs)

3/4 cup whipping cream

1 1/2 teaspoon salt

1 teaspoon fine ground black pepper

2-3 cups of vegetables — See notes for more info on how to prepare the veggies, ideas, ones to choose, and what to avoid.

1 pound breakfast sausage — See notes for more information on making sure your sausage is keto-friendly.

2 cup shredded cheese — Shredded cheddar, gouda, or any shreddable cheese that you like is a great option!

keto breakfast casserole recipe - a piece of baked casserole

How to Make a Keto Breakfast Casserole

1 — Begin by preheating the oven to 350°F and oiling an oven-safe baking dish that’s about 9×13” or holds at least 3 quarts.

2 — Fry the breakfast sausage in a large skillet over medium heat. Use a wooden spoon or spatula to break it up into small pieces as it cooks.

Continue cooking until the sausage is completely cooked, with no pink left.

3 — Place a colander over a bowl and drain the extra fat off of the sausage. Allow it to harden, then throw it out.

Do not pour the grease down the sink, as it will harden and clog the drain.

4 — Wash and prepare the vegetables. If you are planning to add any cooked veggies to your casserole (see the recipe notes), cook them and set aside.

5 — In a large mixing bowl, crack the eggs and beat them with the whipping cream until smooth.

low carb breakfast casserole recipe - beating the eggs on a mixing bowl

6 — Stir in the salt and pepper.

7 — Mix in the vegetables, breakfast sausage, and 1 cup of the shredded cheese. 

keto breakfast casserole recipes - vegetables, sausage, eggs and cheese

8 — Pour the mixture into the prepared baking dish.

9 — Sprinkle the remaining cheese over the top of the casserole.

keto breakfast casserole mixture in a baking dish

10 — Bake the breakfast casserole for 35-40 minutes, or until it is evenly puffed, and the eggs are set when you gently press on the center of the casserole. If they aren’t cooked through, the center will have a lot of give, and you’ll see wet egg seeping through the top of the casserole.

11 — Remove the baked casserole from the oven and allow it to cool slightly. Serve it warm, with sour cream if desired.

keto baked casserole served warm with sour cream

How to Store and Reheat a Low Carb Breakfast Casserole

— Store any leftover casserole in an airtight container in your refrigerator. It will keep for 3-4 days.

— Place a piece of casserole in a microwave-safe container.

— Cut it into a few smaller squares and reheat it 20 seconds at a time until it’s warm. If you heat cooked eggs too quickly, they’ll become rubbery.

If you have a high-powered microwave, you may want to set it to half power.

Recipe Notes and Tips

How to choose a keto-friendly breakfast sausage:

To make sure your breakfast sausage is keto-friendly, check out the nutrition label on the package.

Figure out how many carbs are in the sausage, then subtract the amount of fiber in the sausage.

That quick bit of math should tell you exactly how many carbs are in each serving of sausage.

Low carb vegetable ideas:

You can add nearly any low-carb vegetable you like to your keto breakfast casserole. Here are some ideas and how to prepare them:

Bell peppers: Chop them into 1/2” chunks. You can add them raw or cook them before adding them.

Cooking them will make them softer while adding them to the casserole raw will give you a more crunchy texture.

Onions: Onions complement eggs so well! Like peppers, they will mellow and soften if cooked before baking them in the casserole.

Broccoli and/or cauliflower: Broccoli and cauliflower both have a fairly high water content that can affect the bake time and texture of your casserole.

I would recommend cooking them to remove some of the extra water. If you have leftover roasted broccoli, this is a great way to use it!

Leafy greens: Things like spinach and kale are a great way to get some greens into your breakfast!

Soft greens like spinach shouldn’t be cooked before baking the casserole, while more fibrous greens like kale should be sauteed in a bit of oil or butter for 2-3 minutes before adding them.

Leafy greens typically come in bulk, so you can easily use any leftover greens to make a dairy-free detox green smoothie.

What vegetables to avoid for keto diets:

Avoid high-carb vegetables like sweet potatoes, beets, and corn if you are following a strict keto diet.

Choosing the correct cookware:

While you can use any shape or size baking dish that holds at least 3 quarts, baking times may vary depending on how thick your casserole is in the dish.

breakfast casserole with sour cream on top

More Easy Low Carb Keto Recipes

If you are following the keto diet or just looking for healthy recipes that are easy to make at home, check out a few of our favorites below from the archives —

Healthy Low Carb Keto Breakfast Casserole

Keto Breakfast Casserole Recipe

Print Recipe
5 from 3 votes
Need a healthy breakfast? This Keto Breakfast Casserole is great for meal planning and gives you a low-carb, easy breakfast to start your day off right!
Prep Time20 mins
Cook Time40 mins
Total Time1 hr
Course Breakfast
Cuisine Casseroles

Equipment

  • Mixing bowl
  • 9”x13” baking dish or one that holds at least 3 quarts
  • Skillet
  • Whisk or large fork

Ingredients

  • 14 large eggs if you are using a different size of egg, you’ll need about 2 ½ cups of eggs
  • 3/4 cup whipping cream
  • 1 1/2 tsp salt
  • 1 tsp ground black pepper fine
  • 2-3 cups vegetables refer to the post for more info on how to prepare the veggies
  • 1 lb breakfast sausage refer to the post on how to make sure your sausage is keto-friendly
  • 2 cups shredded cheese cheddar, gouda, or any shreddable cheese that you like is a great option!

Nutrition

Calories: 315kcal | Carbohydrates: 5g | Protein: 18g | Fat: 25g | Saturated Fat: 11g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 9g | Trans Fat: 1g | Cholesterol: 253mg | Sodium: 741mg | Potassium: 257mg | Fiber: 1g | Sugar: 1g | Vitamin A: 2192IU | Vitamin C: 4mg | Calcium: 145mg | Iron: 2mg
Servings: 12
Calories: 315kcal

Notes

How to choose a keto-friendly breakfast sausage:
  • To make sure your breakfast sausage is keto-friendly, check out the nutrition label on the package.
  • Figure out how many carbs are in the sausage, then subtract the amount of fiber in the sausage.
  • That quick bit of math should tell you exactly how many carbs are in each serving of sausage.
 
Low carb vegetable ideas:
You can add nearly any low-carb vegetable you like to your keto breakfast casserole. Here are some ideas and how to prepare them:
  • Bell peppers: Chop them into 1/2” chunks. You can add them raw or cook them before adding them.
    Cooking them will make them softer while adding them to the casserole raw will give you a more crunchy texture.
  • Onions: Onions complement eggs so well! Like peppers, they will mellow and soften if cooked before baking them in the casserole.
  • Broccoli and/or cauliflower: Broccoli and cauliflower both have a fairly high water content that can affect the bake time and texture of your casserole. I would recommend cooking them to remove some of the extra water. If you have leftover roasted broccoli, this is a great way to use it!
  • Leafy greens: Things like spinach and kale are a great way to get some greens into your breakfast! Soft greens like spinach shouldn’t be cooked before baking the casserole, while more fibrous greens like kale should be sauteed in a bit of oil or butter for 2-3 minutes before adding them. Leafy greens typically come in bulk, so you can easily use any leftover greens to make a dairy-free detox green smoothie.
 
What vegetables to avoid for keto diets:
  • Avoid high-carb vegetables like sweet potatoes, beets, and corn if you are following a strict keto diet.
 
Choosing the correct cookware:
  • While you can use any shape or size baking dish that holds at least 3 quarts, baking times may vary depending on how thick your casserole is in the dish.

Instructions

  • Begin by preheating the oven to 350°F and oiling an oven-safe baking dish that’s about 9×13” or holds at least 3 quarts.
  • Fry the breakfast sausage in a large skillet over medium heat. Use a wooden spoon or spatula to break it up into small pieces as it cooks.
    Continue cooking until the sausage is completely cooked, with no pink left.
  • Place a colander over a bowl and drain the extra fat off of the sausage. Allow it to harden, then throw it out.
    Do not pour the grease down the sink, as it will harden and clog the drain.
  • Wash and prepare the vegetables. If you are planning to add any cooked veggies to your casserole (see the recipe notes), cook them and set aside.
  • In a large mixing bowl, crack the eggs and beat them with the whipping cream until smooth.
  • Stir in the salt and pepper.
  • Mix in the vegetables, breakfast sausage, and 1 cup of the shredded cheese.
  • Pour the mixture into the prepared baking dish.
  • Sprinkle the remaining cheese over the top of the casserole.
  • Bake the breakfast casserole for 35-40 minutes, or until it is evenly puffed, and the eggs are set when you gently press on the center of the casserole. If they aren’t cooked through, the center will have a lot of give and you’ll see wet egg seeping through the top of the casserole.
  • Remove the baked casserole from the oven and allow it to cool slightly. Serve it warm, with sour cream if desired.
KEYWORD: keto breakfast casserole

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