Name: Keto Egg and Cheese Breakfast Casserole Recipe
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 8 large eggs; 1 cup heavy cream; 1 teaspoon garlic powder; Salt and pepper to taste; 1 cup shredded cheddar cheese; 1/2 cup cooked sausage, crumbled; 1/2 cup diced bell peppers; 1/4 cup chopped green onions

If you’re looking for a comforting and low-carb way to start your day, this Keto Egg and Cheese Breakfast Casserole Recipe is a game-changer. It’s perfect for busy mornings or brunches when you want something hearty and flavorful that fits your keto goals. I love how this casserole comes together with simple ingredients and delivers a warm, cheesy, satisfying breakfast that keeps me energized all morning.

Keto Egg and Cheese Breakfast Casserole Recipe - Recipe Image — Keto Egg and Cheese Breakfast Casserole, low-carb breakfast casserole, keto brunch recipes, easy keto breakfast, cheesy egg casserole

Jump to:

In the Kitchen
Ingredients at a Glance
How to Make Keto Egg and Cheese Breakfast Casserole Recipe
Things to Remember
Ways to Serve It
Make-Ahead & Keeping Fresh
Frequently Asked Questions
Final Thoughts
Full Printable Recipe

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In the Kitchen

This Keto Egg and Cheese Breakfast Casserole balances rich, savory ingredients with just the right texture. It’s a perfect mix of creamy eggs, melty cheese, and the punchy flavors of sausage and peppers, baked into a toasty, golden top.

Juicy and Tender Every Time: You’ll notice the eggs stay moist thanks to the heavy cream, which keeps the casserole from drying out.
Golden, Satisfying Finish: The cheese browns beautifully on top, adding a little crunch that contrasts the soft inside.
Simple Ingredients, Big Impact: Using cooked sausage and fresh veggies means flavor is front and center without a ton of fuss.
Weeknight to Weekend Ready: I’ve made this on hectic mornings and lazy Sundays alike — it’s easy to prep and always hits the spot.

Ingredients at a Glance

Choosing quality ingredients elevates this Keto Egg and Cheese Breakfast Casserole Recipe from simple to spectacular. Fresh veggies and full-fat dairy make a big difference in flavor and texture.

Large eggs: Fresh, organic if you can — they have a richer flavor and better yolk color.
Heavy cream: Look for full-fat cream for that creamy texture and that perfect custardy feel.
Shredded cheddar cheese: Sharp cheddar adds depth; pre-shredded is fine but freshly grated melts best.
Cooked sausage: Use your favorite pork or turkey sausage, cooked and crumbled for savory hits throughout.
Bell peppers: Choose colorful peppers for sweetness and crunch; red or yellow work beautifully.
Green onions: Adds fresh, mild onion notes that balance the richness.
Seasonings: Garlic powder, salt, and pepper keep things simple but flavorful.

Heads-Up: Exact measurements are in the printable recipe card at the bottom.

How to Make Keto Egg and Cheese Breakfast Casserole Recipe

Step 1 — Whisk the Egg Mixture

Start by preheating your oven to 350°F (175°C) so it’s hot and ready when your casserole goes in. In a large bowl, whisk together the eggs, heavy cream, garlic powder, salt, and pepper until the mixture is smooth and slightly frothy. This frothiness ensures a fluffy texture once baked, so don’t rush this step! I usually give it a good 30 seconds of whisking by hand.

Step 2 — Mix in the Fillings

Next, fold in your cooked sausage, diced bell peppers, chopped green onions, and shredded cheddar cheese. The mix should look colorful and inviting — the veggies add fresh bursts against the rich, cheesy base. Make sure everything is well combined so each bite is balanced and flavorful.

Step 3 — Bake Until Golden and Set

Pour the mixture into a greased 9×13-inch baking dish. I recommend using butter or a light coating of cooking spray to prevent sticking. Bake for 30 to 35 minutes, until the eggs are completely set and the top is a toasty golden brown. You’ll notice the enticing aroma of baked cheese and spices filling your kitchen — a sure sign you’re close! Let it cool slightly before slicing; this helps the casserole hold together better.

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Things to Remember

In my experience, achieving that perfect balance between creamy and firm is all about the baking time and knowing your oven. Keep an eye on it from 30 minutes onward to avoid overcooking, which can dry it out.

Doneness Cue: The casserole is ready when the center is set but not rubbery; a gentle jiggle is okay.
Temperature Trick: Let the casserole rest after baking for about 10 minutes to let the flavors develop and firm up.
Make-Ahead Move: Assemble the casserole the night before and refrigerate, then bake in the morning for ultimate convenience.
Common Pitfall: Avoid skipping the heavy cream; it keeps the casserole tender and prevents cracking.

Ways to Serve It

Finishing Touches

I love adding a sprinkle of fresh herbs like chopped parsley or chives right before serving. It adds a vibrant green pop and fresh aroma that complements the cheesy richness perfectly in this Keto Egg and Cheese Breakfast Casserole Recipe. A side dollop of sour cream or avocado slices can also make each bite silkier and more indulgent.

Plays Well With

This casserole pairs beautifully with a light side salad or some sautéed greens to round out your keto breakfast. Crispy bacon or a few cherry tomatoes add great texture contrasts, and if you’re feeling fancy, a drizzle of hot sauce adds a nice kick.

Simple Plating Upgrades

For weeknights, just slice straight from the pan and plate with a sprig of herbs. For special brunch occasions, try serving the casserole in individual ramekins or adding a little shredded cheese on top and broiling for a minute to get it bubbly and golden. It’s guaranteed to impress without extra effort.

Make-Ahead & Keeping Fresh

Storing Leftovers

Store leftover casserole in an airtight container in the fridge for up to 4 days. It stays nice and moist, but the texture can firm up a bit — which is perfect for quick breakfast slices or snack bars throughout the week.

Freezing Tips

This casserole freezes wonderfully. Slice into portions, wrap tightly in plastic wrap and foil, then place in a freezer bag. Freeze for up to 3 months. To thaw, move to the fridge overnight before reheating to maintain texture and flavor.

Reheating Keto Egg and Cheese Breakfast Casserole Recipe Without Drying Out

You can reheat slices gently in the microwave with a small splash of water or cover loosely with foil in a 325°F oven for about 10-15 minutes to keep it from drying out. Using an air fryer at low temperature for a few minutes also crisps the edges nicely without overheating the entire slice.

Frequently Asked Questions

Can I substitute the heavy cream with another dairy or non-dairy product?

Heavy cream is key for rich texture and moist eggs. You can try full-fat coconut milk or half-and-half, but the consistency and flavor may change slightly.

Is this casserole suitable for meal prep?

Absolutely! It keeps well in the fridge and freezer, making it an excellent option for batching breakfast ahead of a busy week.

Can I add other vegetables or meats to this casserole?

Yes, feel free to customize with mushrooms, spinach, or bacon. Just be mindful of moisture content to avoid a soggy casserole.

How do I know when the casserole is fully cooked?

The eggs should be set and not jiggly in the center; the top will be golden brown. Using a toothpick inserted in the middle to check if it comes out clean is also helpful.

Final Thoughts

This Keto Egg and Cheese Breakfast Casserole Recipe has become a staple in my kitchen because it’s easy, adaptable, and truly satisfying. Whether you’re feeding family on a busy morning or want a reliable keto-friendly dish to prep ahead, this casserole delivers flavor and comfort in every bite. Give it a try, and I’m confident it’ll become part of your rotation, too.

Full Printable Recipe