Low Carb Breakfast Casserole (Easy, Cheesy, Keto-Friendly)

By Sadie Caldwell

On February 9, 2026

A full 9x13 baking dish of savory low carb breakfast casserole, fresh out of the oven with a golden, bubbly cheese topping.

Cuisine

American

Prep time

15 minutes

Cooking time

30 minutes

Total time

45 minutes

Servings

8 servings

Say goodbye to boring breakfasts and hello to this incredibly easy and delicious Low Carb Breakfast Casserole! This recipe is a game-changer for busy mornings, meal prep, and anyone following a keto or low-carb lifestyle. It’s packed with savory sausage, fluffy eggs, and melted cheese, making it a satisfying and protein-rich start to your day. You can have a hearty, healthy breakfast on the table with minimal effort, and it’s a dish the whole family will love.

We’ve designed this casserole to be as simple as it is flavorful. It’s the perfect solution for using up leftover vegetables and can be customized in countless ways to suit your taste. Let’s dive into making your new favorite morning meal.

A spatula lifting a cheesy slice of the easy sausage egg bake from the casserole dish, showing the layers of ingredients.
That first slice is always the most satisfying.

Why You’ll Love This Low Carb Breakfast Casserole

This isn’t just another egg bake; it’s a powerhouse of flavor and convenience. It’s the perfect one-pan meal that simplifies your morning routine while keeping you full and energized for hours. Whether you need a quick weekday breakfast or a crowd-pleasing dish for a weekend brunch, this recipe delivers.

  • Effortless Meal Prep: Assemble it the night before and bake it in the morning for a stress-free start.
  • Keto-Friendly & Gluten-Free: With no bread or potatoes, this casserole is naturally low in carbs and perfect for a ketogenic diet.
  • Completely Customizable: Swap the sausage for bacon, add your favorite veggies, or try different cheeses. The possibilities are endless!
  • Family-Approved: Even the pickiest eaters will be asking for a second slice of this cheesy, savory bake.

Key Ingredients

The beauty of this low carb breakfast casserole lies in its simple, high-quality ingredients. You don’t need anything fancy to create a truly spectacular dish.

The Core Components

These are the non-negotiables for that classic casserole flavor and texture.

  • Pork Sausage: Provides the savory, hearty base. Use your favorite brand, whether it’s mild, sweet, or spicy.
  • Large Eggs: The foundation of the casserole, creating a light and fluffy texture.
  • Heavy Cream: Adds richness and creaminess that you can’t get from milk alone.
  • Cheddar & Mozzarella Cheese: A combination of sharp cheddar for flavor and gooey mozzarella for that perfect cheese pull.

Vegetables & Aromatics

These add freshness, color, and depth of flavor to the dish.

  • Onion & Bell Peppers: A classic trio that adds a touch of sweetness and texture.
  • Garlic: For a foundational aromatic flavor.
  • Seasonings: Salt, black pepper, and dried parsley are all you need to enhance the flavors.
A full 9x13 baking dish of savory low carb breakfast casserole, fresh out of the oven with a golden, bubbly cheese topping.
Fresh from the oven and ready to impress!

Step-by-Step Instructions

Follow these simple steps to create the perfect breakfast casserole every time.

  1. Preheat and Prepare: Start by preheating your oven to 375°F (190°C). Grease a 9×13-inch baking dish to prevent sticking.
  2. Cook the Sausage and Veggies: In a large skillet over medium-high heat, cook the pork sausage until it’s browned, crumbling it with a spoon as it cooks. Drain off any excess grease. Add the chopped onion and bell peppers to the skillet and cook until they are soft, about 5-7 minutes. Stir in the minced garlic and cook for another minute until fragrant.
  3. Assemble the Base: Spread the cooked sausage and vegetable mixture evenly across the bottom of your prepared baking dish. Sprinkle half of the shredded cheddar and mozzarella cheese over the top. For another cheesy option, try this Cheesy Sausage and Rice recipe.
  4. Mix the Eggs: In a large bowl, whisk together the eggs, heavy cream, salt, pepper, and dried parsley until well combined and frothy.
  5. Combine and Bake: Pour the egg mixture evenly over the sausage and cheese in the baking dish. Top with the remaining cheese. Bake for 25-30 minutes, or until the center is set and the top is golden brown. A knife inserted into the center should come out clean.
  6. Rest and Serve: Let the casserole rest for 5-10 minutes before slicing and serving. This allows it to set up properly, making it easier to cut.

Tips for the Perfect Casserole

Want to guarantee a flawless result? Here are a few expert tips.

  • Don’t Overbake: Keep an eye on the casserole. Overbaking can lead to a rubbery texture. The center should be just set, with a slight wobble.
  • Drain the Grease Well: To avoid a greasy casserole, make sure to drain the sausage thoroughly after browning.
  • Bring Eggs to Room Temperature: Allowing your eggs to come to room temperature before whisking helps them combine better and creates a lighter, fluffier texture. This is a great tip for many egg dishes, including a Crustless Spinach Quiche.

Delicious Variations to Try

Use this recipe as a starting point and get creative with your favorite ingredients.

Southwestern Style

Give your casserole a Tex-Mex twist! Swap the pork sausage for chorizo, use a Mexican cheese blend, and add a can of diced green chiles. Serve with a dollop of sour cream and fresh salsa.

Vegetarian Delight

For a meat-free version, simply omit the sausage and load up on the vegetables. Sautéed mushrooms, spinach, and broccoli are fantastic additions. You might also enjoy our Spinach and Mushroom Egg Casserole.

Bacon & Swiss

Swap the sausage for a pound of crispy, crumbled bacon and use Swiss cheese instead of cheddar and mozzarella. The smoky, nutty flavor combination is absolutely irresistible.

Make-Ahead & Storage Solutions

Can I Make This Ahead of Time?

Absolutely! This is one of the best features of this Low Carb Breakfast Casserole. You can assemble the entire casserole (without baking) the night before. Simply cover it tightly with plastic wrap and store it in the refrigerator. In the morning, remove it from the fridge while the oven preheats, then bake as directed. You may need to add 5-10 minutes to the baking time.

How to Store and Reheat Leftovers

Store leftover casserole in an airtight container in the refrigerator for up to 4 days. You can also freeze individual slices for a quick grab-and-go breakfast. To reheat, simply microwave a slice for 60-90 seconds or warm it in the oven at 350°F until heated through.

What to Serve with Your Casserole

While this casserole is a complete meal on its own, you can easily round it out with a few simple sides. A fresh green salad, sliced avocado, or some keto-friendly toast would be excellent accompaniments.

Frequently Asked Questions

Yes, absolutely! This recipe is perfect for making ahead. Simply assemble the entire casserole, cover it tightly, and refrigerate. When you’re ready to bake, you may need to add 5-10 minutes to the cooking time.

Store leftovers in an airtight container in the refrigerator for up to 4 days. To reheat, you can microwave individual slices for 60-90 seconds or warm them in an oven at 350°F (175°C) until heated through.

The key is to manage moisture. Make sure to drain the sausage very well after cooking. Also, if you’re using vegetables with high water content like mushrooms or spinach, it’s best to sauté them first to cook off some of the liquid before adding them to the casserole.

Yes, it is! This recipe is specifically designed to be low in carbohydrates and high in protein and healthy fats. It uses eggs, meat, cheese, and heavy cream, making it a perfect fit for a ketogenic diet.

You can easily substitute the pork sausage with other meats like ground turkey, crumbled bacon, diced ham, or even chorizo for a spicy kick. For a vegetarian option, you can omit the meat entirely and add more vegetables.

Enjoy Your New Favorite Breakfast!

This Low Carb Breakfast Casserole is more than just a recipe; it’s a solution for delicious, healthy, and stress-free mornings. We know you’ll love it as much as we do. If you make it, we’d love to hear from you! Leave a comment below or share a photo of your creation on Pinterest and tag us!

A delicious slice of low carb breakfast casserole on a white plate, showcasing the cheesy sausage and egg layers. Perfect for a keto-friendly breakfast meal prep.
The perfect way to start your day: a hearty slice of our Low Carb Breakfast Casserole!

Low Carb Breakfast Casserole Recipe

A full 9x13 baking dish of savory low carb breakfast casserole, fresh out of the oven with a golden, bubbly cheese topping.

Low Carb Breakfast Casserole (Easy, Cheesy, Keto-Friendly)

This easy Low Carb Breakfast Casserole is a game-changer for busy mornings! Packed with savory sausage, fluffy eggs, and melted cheese, it's the perfect keto-friendly, gluten-free, and satisfying start to your day.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 8 servings
Course: Breakfast, Brunch
Cuisine: American
Calories: 380

Ingredients
  

Casserole
  • 1 lb ground pork sausage mild or spicy
  • 10 large eggs
  • 1/2 cup heavy cream
  • 1 cup shredded cheddar cheese divided
  • 1 cup shredded mozzarella cheese divided
  • 1 small onion chopped
  • 1 bell pepper chopped (any color)
  • 2 cloves garlic minced
  • 1 tsp salt
  • 1/2 tsp black pepper
  • 1 tbsp dried parsley

Equipment

  • 1 9x13 inch Baking Dish
  • 1 Large Skillet
  • 1 Large Mixing Bowl

Instructions
 

  1. Preheat oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
  2. In a large skillet, cook the ground sausage over medium-high heat until browned. Drain excess grease. Add the chopped onion and bell pepper and cook until softened, about 5-7 minutes. Stir in the minced garlic and cook for one more minute until fragrant.
  3. Spread the sausage and vegetable mixture evenly in the bottom of the prepared baking dish. Sprinkle with half of the cheddar and mozzarella cheese.
  4. In a large bowl, whisk the eggs, heavy cream, salt, pepper, and parsley until fully combined.
  5. Pour the egg mixture over the sausage and veggies. Top with the remaining cheese.
  6. Bake for 25-30 minutes, or until the center is set and the top is golden brown. Let it cool for 5-10 minutes before slicing and serving.

Notes

Make-Ahead Tip: Assemble the casserole without baking, cover tightly, and refrigerate overnight. Add 5-10 minutes to the bake time.
Storage: Store leftovers in an airtight container in the refrigerator for up to 4 days.

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