Breakfast Keto Egg Casserole Recipe

Last Updated on November 15, 2022 by Ellen Christian

We all know that breakfast is the most important meal of the day, but it can also be one of the hardest meals to make. This Keto Egg Casserole is the solution!

It’s easy to get stuck in a rut with boring cereal or eggs on toast every morning. And if you’re trying to eat healthy, it can feel impossible to find something tasty and nutritious at home.

Keto Egg Casserole Recipe

This keto breakfast casserole recipe will solve your breakfast problems! With just a few ingredients and 20 minutes of prep time, this low-carb breakfast will become a weekend favorite! 

Be sure to use fresh ingredients for this recipe. If you have time, cook the mushrooms and peppers in bacon grease to pack an extra punch of flavor!

I just love casseroles and this one really is a 5 star breakfast casserole! Check out the recipe card below to see the net carbs and other nutrition facts.

What type of baking dish should I use?

You can use any type of oven-safe dish you would like, but I recommend a glass 13×9 casserole dish. I used a pyrex baking dish and it turned out great!

This really is one of my favorite low carb gluten free keto breakfast recipes. Low carb recipes can be just as delicious as any other type of breakfast casserole.

Can I use another type of shredded cheese?

You can use any type of cheese you have on hand. I used cheddar but you may also want to try Colby jack, mozzarella, or Colby!

Be aware that some types of cheese have carbs. Keep that in mind when choosing what to add to your cheese casserole recipe.

Is low carb keto?

This recipe is low carb and keto. But, low carb and keto are not always the same thing. Low carb is any diet that limits carbohydrates, which are found in many types of foods including fruit and grains. Keto restricts these while focusing on fats instead.

What type of breakfast casserole can I make?

Low-carb keto recipes are often full of meats, eggs, cheese, leafy greens, nuts, and seeds to create very filling dishes.

There is no added meat in this recipe so you can serve it to your vegetarian friends. But, if you prefer you can add breakfast meat to it.

Be sure to check your package breakfast sausage for carbohydrates. This can be a hidden source of carbs. If you’re concerned, stick with adding crumbled bacon instead.

This is a very hearty breakfast for anyone on the keto diet. It’s a favorite on Christmas morning because it’s such an easy breakfast that serves quite a few people.

Equipment to make this egg bake recipe

• 9×13 prepared baking dish
• Large skillet (to fry breakfast meat)
• Plastic wrap (to store leftovers)
• Wooden spoon
• Large bowl
• No stick spray

Optional ingredients for your breakfast casserole

You can easily add these to the basic recipe for this breakfast casserole if you like.

• Cooked sausage (try spicy sausage)
• Garlic powder
• Fresh spinach (baby spinach works great)
• Hot sauce
• Ground beef
• Hot peppers (instead of sweet peppers)
• Minced garlic
• Other veggies
• More cheese

What’s in the egg mixture?

To keep this a keto breakfast casserole recipe, you should avoid using traditional milk. It’s very high in carbs. Instead, use heavy cream which is a much better fit for the ketogenic diet. Heavy whipping cream would work as well.

You will want to use both the egg whites and the yolks in your egg mixture. When it comes to eggs, the yolk contains most of the nutrition.

Keto breakfast casserole ingredients

• 2 teaspoons olive oil
• 1 (8 ounce) package sliced mushrooms
• 1 cup chopped bell peppers
• 12 eggs
• 2 tablespoons heavy cream
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1/4 cup shredded cheddar cheese

Meal prepping tips for this low carb breakfast

This keto egg casserole recipe is a great dish to make ahead on the weekends. Prepare it early and simply reheat it on busy mornings for a quick, healthy low-carb breakfast!

Make your life easier by cooking bacon on the weekend as well. Be sure to keep some in the fridge for busy weekday mornings!

If you are using fresh mushrooms and peppers, cook them in bacon grease to pack extra flavor. This will help keep your keto breakfast casserole moist as well!

To save time in the morning, you can chop the vegetables and shred the cheese ahead of time. Store them in the fridge overnight.

How do I store this low carb breakfast?

Feel free to freeze any leftovers for an easy weeknight meal later on! Just be sure to wrap it up tightly.

This keto breakfast casserole will last about 4 days in the fridge. It should be reheated slowly in a skillet or oven to avoid drying it out. If you are concerned, simply cut the leftovers up into small pieces and serve them over salad for lunch!

Reheat leftovers for an easy breakfast the next day. Or, serve this breakfast casserole for lunch or dinner instead. You can add more cheese to the top if you like when you heat it up.

How to make this low carb breakfast casserole

Preheat oven to 350 degrees. Prepare a 9×13 casserole dish with nonstick cooking spray.

In a large skillet over medium high heat, pour the olive oil. Add the bell peppers and mushrooms, cooking for 3 to 4 minutes. Transfer the vegetables to the prepared casserole dish.

In a large mixing bowl, beat the eggs with heavy cream, salt, and black pepper. Add hot sauce if desired.

Pour the egg mixture over the vegetables and then sprinkle with the cheddar cheese.

Bake the egg and cheese casserole for 40 to 45 minutes or until a knife inserted in the middle comes out clean. The top should be golden brown.

Can I make keto egg casserole in muffin tins?

Absolutely! It will be flatter but it works great if you are working on portion control. Keto egg bake muffins are easy to take on the go.

Adjust your cooking time to 35 minutes or until cooked through. 

You may have to run a knife around the egg cups to get them out of the pan. Be sure to spray the muffin tin with non stick cooking spray so they don’t stick.

When it comes to breakfast cuisine, it’s difficult to find pre-made keto breakfast foods at the store. I really love these low carb bars for on-the-go breakfasts. Or, you can try spicy sausage in this turkey breakfast burrito jar recipe. It’s a great option for those that like meal prep ahead of time.

If you liked this keto egg casserole, you may enjoy these:

• Breakfast smoothies
• Paleo egg cups
• Buffalo chicken chaffles
• Can you cook frozen bacon?

This post was originally published in 2009 and has been updated.