Amazing 12 Egg- Classic Keto Sausage & Egg Breakfast Casserole

Growing up here in the South, breakfast wasn’t just something quick you grabbed on the way out the door; it felt like an event! I can still smell the sizzle of pork sausage and hear the eggs bubbling away while the whole house slowly woke up. When I shifted my cooking toward keto and low-carb living, I missed that cozy, hearty feeling more than anything. I didn’t want to sacrifice that comfort just to stay within my macros. That feeling is exactly what inspired this Classic Keto Sausage & Egg Breakfast Casserole.

Trust me when I say this recipe keeps every wonderful part of a traditional morning bake—that warmth, the savory flavors, the sheer comfort—while fitting perfectly into a clean keto lifestyle. This isn’t just another fussy low-carb meal; it’s a genuine, make-ahead staple for busy mornings. I whip this up every Sunday, knowing I have a satisfying, protein-packed meal ready for reheating all week long. Every forkful reminds me that meaningful food doesn’t have to be complicated, it just needs that touch of heart that only a good casserole can bring to the table.

It proves you don’t have to give up that satisfying, cozy breakfast just because you’re eating carb-free. You’ll find the full recipe details below, and I think you’ll agree that this has everything you need for a great morning. For more on my philosophy behind blending tradition with dietary needs, you can always check out my story.

Why You Will Love This Classic Keto Sausage & Egg Breakfast Casserole

Honestly, what’s not to love about a dish that tastes this good and keeps you feeling full until dinner? This casserole is truly the perfect way to start your day, especially when you’re keeping it low carb.

  • It’s completely keto compliant, so no sneaky carbs here!
  • It’s a fantastic make-ahead option—prep it Saturday, bake it Sunday.
  • It brings that warm, savory comfort we all crave in a perfect Low Carb Breakfast Casserole.
  • It’s rich in protein, which I really need to keep me going.

If you’re looking for more great ideas for weekend morning meals, you should definitely check out my favorite Christmas breakfast and brunch ideas!

Essential Equipment for Your Classic Keto Sausage & Egg Breakfast Casserole

You don’t need a huge setup for this casserole, which is part of what makes it such a brilliant Keto Breakfast Easy meal. I like keeping things simple, which means fewer dishes to tackle later! Here’s what you’ll want clean and ready before you start cooking.

  • A sturdy 9×13 baking dish—this is the backbone of the whole dinner, so make sure it’s big enough!
  • A large skillet for browning up that delicious breakfast sausage until it’s perfectly crumbly.
  • A big mixing bowl for whisking the eggs and getting that creamy base mixed just right.
  • A reliable whisk to make sure those eggs are smooth, and a spatula or wooden spoon for handling the sausage and folding in the cheese.

Gathering Ingredients for the Perfect Classic Keto Sausage & Egg Breakfast Casserole

Okay, let’s talk ingredients. This recipe shines because we use fresh, high-quality staples, and we keep the carbs practically invisible. I broke the list down into two parts so you can get your prep station organized—it makes assembly so much smoother later on. Seriously, having everything ready before the oven heats up saves so much stress!

We are using fresh spinach here, not frozen—trust me on that one for texture! Also, remember to keep those scallions separated, because the white parts go in the bake, and the green parts are reserved for the prettiest garnish at the end.

If you’re looking for more quick, family-friendly meals that don’t take up your whole evening, make sure to check out my collection of easy recipes for kids!

For the Casserole Base

  • Three cups of fresh spinach leaves—no need to wilt them first!
  • Four scallions, sliced; make sure you keep the white parts separate from the green parts you’ll use for topping later.
  • A quarter cup of fresh parsley, finely chopped—this just brightens everything up.
  • Sixteen ounces of good breakfast sausage. Use your favorite brand, but make sure it’s high-quality and low-sugar.

For the Egg Mixture

  • Twelve large eggs—we need that structure for a good keto bake!
  • Three-quarters of a cup of heavy cream. Don’t skimp on the fat here; that’s our fuel.
  • Half a teaspoon of garlic powder and half a teaspoon of kosher salt.
  • A quarter teaspoon of that freshly cracked black pepper—always fresh cracked, please!
  • Two beautiful cups of freshly shredded cheddar cheese. See the notes in the full recipe for cheese swaps, but cheddar is my heart here.

Step-by-Step Instructions for Your Keto Breakfast Ideas Easy

Alright, this is where the magic happens! If you’ve got your ingredients ready, putting this Keto Breakfast Ideas Easy casserole together is a breeze. Remember, timing is everything, and we want this ready to go right when that oven hits the right temperature. I always set the oven first so it’s piping hot before I even start cooking the sausage.

We are layering things here for the best texture, so pay attention to the assembly order—it makes a huge difference in the final result!

Preparing the Dish and Layering the Base

First things first: crank that oven up to 375 degrees Fahrenheit. Grab that 9×13 dish and give it a good greasing with butter or spray; we don’t want anything sticking later! Now, we build flavor from the bottom up. Spread those three cups of fresh spinach leaves right across the bottom. Scatter in the white parts of your chopped scallions and toss in that fresh parsley. That earthy base is going to be fantastic once it steams a little while baking.

Cooking the Sausage and Mixing the Eggs

While your dish is waiting, get that sausage browning in your large skillet over medium heat. You need to break it down really well with your spatula until it’s nicely crumbled and browned all over. While that’s happening—seriously, multitask here—you whisk like a maniac in your big bowl! Combine those twelve eggs, the heavy cream, garlic powder, salt, and pepper until they are perfectly smooth. Once that egg base is whisked, gently fold in your two cups of cheddar cheese.

Assembling and Baking the Classic Keto Sausage & Egg Breakfast Casserole

With the base layered and the eggs mixed, it’s time to stack! Spoon that warm, cooked sausage evenly over the greens in your pan. Then—slowly, try not to mess up your layers—pour that creamy egg mixture right over the top. You want it to settle deep into any sausage gaps. Pop the whole thing into that hot oven and let it bake for 20 to 25 minutes. It’s done when it’s firm right up to the center. Pull it out, let it rest a tiny bit, garnish with those reserved green scallions, and enjoy this perfect Classic Keto Sausage & Egg Breakfast Casserole!

A close-up of a serving of Classic Keto Sausage & Egg Breakfast Casserole with melted cheddar and green onions.

Don’t forget to enjoy some of my tips for cozy Christmas drinks and breakfast sides while you wait for yours to bake!

Tips for Success Making a Keto Friendly Breakfast

When you’re making a Keto Breakfast Easy meal like this, the quality of your primary ingredients really determines the final flavor payoff. Since we nix the flour and bread, that sausage and cheese have to pull double duty, so don’t grab the bargain bin stuff! I always try to use a good quality bulk sausage—check the label, you want zero added sugar. This is key for keeping it a true Healthy Low Carb Breakfast.

Close-up of a serving slice being lifted from the Classic Keto Sausage & Egg Breakfast Casserole, showing sausage, spinach, and melted cheese.

Also, remember that you can tweak this, which is great for meal prepping versatility. This recipe is so forgiving, which is why it’s one of my go-to comfort foods.

Ingredient Substitutions for Your Low Carb Breakfast Casserole

Feel free to swap out the sausage if you need to! If you want a flavor change, use ground chicken or turkey, but you’ll need to add extra salt and maybe a pinch of sage to make up for the sausage seasoning. If you aren’t a cheddar fan, Monterey Jack melts beautifully and gives a silkier texture, or you could try Pepper Jack for a little kick!

Remember, for this to stay firmly in the low carb zone, whatever meat or cheese you use must be certified carb-free. If you want to know more about general cooking standards and liability, you can read my cooking disclaimer.

Storage and Reheating Instructions for Your Carb Free Breakfast

One of the joys of making a huge Carb Free Breakfast like this casserole is having leftovers! This is just as delicious on Tuesday morning as it was on Sunday, which is why I rely on it for my weekly meal prepping. When you take it out of the oven, let it cool down just slightly on the counter until it’s just warm.

Then, you need to wrap that dish up tightly—I usually use plastic wrap followed by a layer of foil if it’s not already in an airtight container. Keep it in the fridge for up to four days. Reheating in the microwave is the fastest way; just pop a square onto a plate and zap it for about 45 seconds to a minute until it’s steaming hot again! If you prefer it crispy, pop the square onto a baking sheet at 350 degrees for about 10 minutes.

A square slice lifted from a baked Classic Keto Sausage & Egg Breakfast Casserole topped with melted cheddar and green onions.

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Frequently Asked Questions About the Classic Keto Sausage & Egg Breakfast Casserole

I always get questions when I post this recipe because everyone wants to make sure their Healthy Low Carb Breakfast turns out perfectly! Here are a few things I hear most often from folks trying to bake up the best keto casserole.

Can I make this Classic Keto Sausage & Egg Breakfast Casserole ahead of time?

Oh, absolutely, this is my favorite make-ahead meal! You can assemble the entire thing—layers, eggs, cheese, everything—the night before. Just cover it tightly with plastic wrap and pop it into the fridge. When you pull it out in the morning, you just need to add about 5 to 10 minutes extra to that baking time since it’s starting out chilled. It’s still an incredibly easy win for a rushed morning!

What is the best way to ensure this Low Carb Breakfast Casserole is not watery?

That’s a great question about wateriness! The main culprit is usually excess liquid from the meat. Make sure you drain every last bit of grease from the sausage after you cook it down in the skillet. Also, I use room-temperature eggs and cream, which incorporate much better than ice-cold ones. That little step really helps guarantee a firm, beautiful bake every time.

Can I add other vegetables to this Keto Friendly Breakfast?

Yes, you totally can add more volume with veggies! If you want to bulk this up further into something even more substantial—maybe even for a hearty weekend brunch—feel free to toss in some sautéed mushrooms or diced bell peppers. The only thing is, you must cook them down first until they release most of their moisture. Otherwise, like the sausage grease, excess water content will make your beautiful casserole soggy in the middle.

A square slice being lifted from a baked Classic Keto Sausage & Egg Breakfast Casserole topped with melted cheddar and green onions.

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Nutritional Estimates for Your Keto Breakfast Easy

Now, I know many of you are tracking macros, so let’s talk numbers for this Keto Breakfast Easy casserole. This information is based on the ingredient amounts listed above, cut into 12 generous squares. Remember, since we all use slightly different sausages or brands of cheese, these are sweet guidelines, not gospel!

The goal here is high fat and high protein to keep us feeling satisfied, and we are delightfully low on carbs, which is exactly what we want for a true keto-friendly start to the day. This is a powerhouse meal!

  • Calories: Approximately 450 per square
  • Net Carbohydrates: About 4 grams
  • Protein: A fantastic 30 grams
  • Fat: Around 34 grams

Just keep in mind that if you load up on extra cheese or use a fattier sausage, your fat and calorie count will naturally shift upwards. Same goes if you use a leaner meat—you’ll see the protein go up and the fat dip down. It’s highly customizable, but this general estimate should definitely keep you on track with your goals. For full transparency on site usage standards, you can review my terms of use here.

Share Your Experience with This Classic Keto Sausage & Egg Breakfast Casserole

Now that you have this recipe for your new go-to Classic Keto Sausage & Egg Breakfast Casserole, I truly hope it brings some of that cozy, Southern comfort to your mornings, no matter what day of the week it is!

I pour my heart into these recipes to make sure they are reliable, delicious, and fit right into your busy life. I absolutely live to hear how they turn out for you! Did you try mixing in some smoky paprika with the sausage? Did your family devour it as fast as mine does?

Don’t be shy! Please leave a rating right down below—it really helps other folks see that this is a tried-and-true recipe. If you snap a picture of your beautiful, golden-brown bake, tag me on social media! Seeing your creations makes my day and proves that eating low-carb doesn’t mean sacrificing that wonderful feeling of a homemade, hearty meal.

Keep that Southern comfort spirit alive in your keto kitchen! You can find more of my favorite breakfast dishes, including more family-approved breakfast recipes, right here on the site!

A square slice of Classic Keto Sausage & Egg Breakfast Casserole being lifted from the baking dish, topped with melted cheddar and green onions.

Classic Keto Sausage & Egg Breakfast Casserole

This casserole keeps everything you love about a traditional breakfast bake: rich flavor, warmth, and comfort, while fitting perfectly into a keto lifestyle. It is a filling, make-ahead option for busy mornings.
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 12 squares
Course: Breakfast
Cuisine: American
Calories: 450

Ingredients
  

For the Casserole Base
  • 3 cups spinach leaves fresh, uncooked
  • 4 scallions sliced, white and green parts separated Use white parts for base, green parts for garnish
  • 1/4 cup chopped fresh parsley
  • 16 ounces breakfast sausage See Notes for options
For the Egg Mixture
  • 12 large eggs
  • 3/4 cup heavy cream
  • 1/2 teaspoon garlic powder
  • 1/2 teaspoon kosher salt
  • 1/4 teaspoon freshly cracked black pepper
  • 2 cups freshly shredded cheddar cheese See Notes for options

Equipment

  • 9×13 baking dish
  • Large skillet
  • Large mixing bowl
  • Whisk
  • Spatula or wooden spoon

Method
 

  1. Preheat your oven to 375 degrees Fahrenheit. Lightly grease your baking dish with cooking spray or butter. Layer the spinach leaves, the white parts of the scallions, and the chopped parsley in the bottom of the dish. Set the dish aside.
  2. Cook the breakfast sausage in a large skillet over medium heat until it is browned and crumbled. Stir often while cooking and break the sausage into small pieces using a spatula or wooden spoon.
  3. While the sausage cooks, whisk together the eggs, heavy cream, garlic powder, salt, and pepper in a large mixing bowl. Once the ingredients are fully combined, gently fold in the shredded cheddar cheese.
  4. Layer the cooked sausage on top of the spinach leaves in the prepared baking dish. Pour the egg mixture over the sausage, making sure to distribute the mixture as evenly as possible across the baking dish.
  5. Place the baking dish in the preheated oven and bake for 20 to 25 minutes, or until the casserole is firm and the eggs are cooked through. Remove from the oven and slice into 12 squares. Garnish with the green parts of the scallions and additional shredded cheese if you wish, then serve warm.

Nutrition

Calories: 450kcalCarbohydrates: 4gProtein: 30gFat: 34gSaturated Fat: 12gCholesterol: 350mgSodium: 600mgPotassium: 450mgFiber: 1gSugar: 2gVitamin A: 300IUVitamin C: 5mgCalcium: 250mgIron: 2mg

Notes

This recipe works well for meal prepping. You can assemble the entire casserole the night before, cover it, and refrigerate. Add about 5 to 10 minutes to the baking time if baking directly from the refrigerator.

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