Low Carb Egg Casserole – A Simple, Satisfying Make-Ahead Breakfast

If your mornings feel rushed, this low carb egg casserole is a lifesaver. It’s hearty, full of flavor, and easy to prep the night before. You get plenty of protein and veggies in every bite, without the heavy carbs that slow you down.

It’s also a great option for feeding a crowd, from busy families to brunch guests. The best part? You can customize it with what you have on hand and still get a delicious, reliable result.

Print Recipe

Low Carb Egg Casserole - A Simple, Satisfying Make-Ahead Breakfast

Prep Time10 minutes mins

Cook Time35 minutes mins

Total Time45 minutes mins

Servings: 8 servings

Ingredients

• 10 large eggs
• 1/2 cup heavy cream (or unsweetened almond milk for lighter option)
• 1 cup shredded cheddar cheese (or a blend like cheddar and Monterey Jack)
• 8 ounces breakfast sausage or bacon, cooked and crumbled (use sugar-free if low carb matters)
• 1 cup chopped broccoli florets (small pieces)
• 1/2 cup diced bell pepper (any color)
• 1/2 cup diced onion
• 1 cup fresh spinach, roughly chopped
• 2 cloves garlic, minced
• 2 tablespoons olive oil or butter
• 1 teaspoon kosher salt (divided, adjust to taste)
• 1/2 teaspoon black pepper
• 1/2 teaspoon smoked paprika (optional, for depth)
• 1/4 teaspoon crushed red pepper flakes (optional, for heat)
• Fresh herbs for garnish (chives, parsley, or green onions), optional

Instructions

• Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish with butter or nonstick spray.
• Cook the protein. In a skillet, cook the sausage or bacon until browned and crisp. Drain excess fat if needed and set aside.
• Sauté the vegetables. In the same skillet, add olive oil or butter. Sauté onion and bell pepper with a pinch of salt for 3–4 minutes until softened. Add broccoli and cook 2–3 minutes more. Stir in garlic and spinach until the spinach just wilts. Remove from heat.
• Whisk the eggs. In a large bowl, whisk together eggs, heavy cream, remaining salt, pepper, smoked paprika, and red pepper flakes until smooth and well combined.
• Assemble the casserole. Spread the cooked sausage or bacon evenly in the prepared dish. Top with the sautéed veggies. Sprinkle half the cheese over the top.
• Pour in the eggs. Slowly pour the egg mixture over the fillings, tilting the dish slightly as needed so it spreads evenly. Top with the remaining cheese.
• Bake for 28–35 minutes, until the center is just set and the edges are lightly golden. A knife inserted near the center should come out clean, or the center should reach about 165°F (74°C).
• Rest and serve. Let the casserole rest for 5–10 minutes to set. Slice into squares and garnish with chopped herbs if you like.

What Makes This Special

This casserole strikes a balance between comfort food and smart eating.

You’ll get the richness of eggs, cheese, and savory add-ins, but it stays light on carbs thanks to strategic ingredient choices.

• Low-carb focus: Uses non-starchy veggies and skips bread or potatoes.
• Meal-prep friendly: Bakes well, reheats beautifully, and freezes without turning watery.
• Customizable: Mix and match proteins, veggies, and cheeses to fit your taste or what’s in your fridge.
• One-pan convenience: Everything comes together in a single baking dish for easy cleanup.

Ingredients

• 10 large eggs
• 1/2 cup heavy cream (or unsweetened almond milk for lighter option)
• 1 cup shredded cheddar cheese (or a blend like cheddar and Monterey Jack)
• 8 ounces breakfast sausage or bacon, cooked and crumbled (use sugar-free if low carb matters)
• 1 cup chopped broccoli florets (small pieces)
• 1/2 cup diced bell pepper (any color)
• 1/2 cup diced onion
• 1 cup fresh spinach, roughly chopped
• 2 cloves garlic, minced
• 2 tablespoons olive oil or butter
• 1 teaspoon kosher salt (divided, adjust to taste)
• 1/2 teaspoon black pepper
• 1/2 teaspoon smoked paprika (optional, for depth)
• 1/4 teaspoon crushed red pepper flakes (optional, for heat)
• Fresh herbs for garnish (chives, parsley, or green onions), optional

Instructions

1. Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with butter or nonstick spray.
2. Cook the protein. In a skillet, cook the sausage or bacon until browned and crisp.

   Drain excess fat if needed and set aside.

3. Sauté the vegetables. In the same skillet, add olive oil or butter. Sauté onion and bell pepper with a pinch of salt for 3–4 minutes until softened.

   Add broccoli and cook 2–3 minutes more. Stir in garlic and spinach until the spinach just wilts. Remove from heat.

4. Whisk the eggs.

   In a large bowl, whisk together eggs, heavy cream, remaining salt, pepper, smoked paprika, and red pepper flakes until smooth and well combined.

5. Assemble the casserole. Spread the cooked sausage or bacon evenly in the prepared dish. Top with the sautéed veggies.

   Sprinkle half the cheese over the top.

6. Pour in the eggs. Slowly pour the egg mixture over the fillings, tilting the dish slightly as needed so it spreads evenly. Top with the remaining cheese.
7. Bake for 28–35 minutes, until the center is just set and the edges are lightly golden.

   A knife inserted near the center should come out clean, or the center should reach about 165°F (74°C).

8. Rest and serve. Let the casserole rest for 5–10 minutes to set. Slice into squares and garnish with chopped herbs if you like.

Storage Instructions

• Refrigerate: Cool completely, then cover or place in airtight containers.

  Keeps for 4 days.

• Freeze: Slice into portions, wrap tightly, and freeze for up to 2 months. For best texture, wrap in plastic and then foil or use a freezer-safe container.
• Reheat: Microwave individual slices for 60–90 seconds, or reheat in a 300°F (150°C) oven for 10–12 minutes. If frozen, thaw overnight in the fridge before reheating for even results.

Benefits of This Recipe

• Low in carbs, high in protein: Keeps you satisfied without the mid-morning crash.
• Versatile and budget-friendly: Uses simple ingredients and reduces waste by welcoming leftovers.
• Great for meal prep: Make once, eat for several days.

  Perfect for busy schedules.

• Gluten-free by default: No bread or flour needed.
• Family-friendly: Mild flavors that appeal to kids and adults, with easy ways to dial up spice.

What Not to Do

• Don’t skip draining excess fat from sausage or bacon, or the casserole can turn greasy.
• Don’t add raw, watery vegetables like mushrooms or zucchini without sautéing first; they’ll release water and make it soggy.
• Don’t overbake. Dry eggs are tough and rubbery. Pull it when the center is just set.
• Don’t overload the fillings. Too much volume prevents even cooking. Stick to about 3 cups of total mix-ins.
• Don’t skip seasoning. Eggs need salt and spice to taste their best.

Recipe Variations

• Mediterranean: Replace cheddar with feta, add olives, sun-dried tomatoes, spinach, and oregano.

  Use turkey sausage or skip meat for vegetarian.

• Southwest: Use pepper jack cheese, add green chiles, cilantro, and cooked chorizo. Serve with salsa and avocado slices.
• Cheesy Broccoli: Double the broccoli, use sharp cheddar, and add a pinch of nutmeg for warmth.
• Ham and Swiss: Cubed ham, shredded Swiss, and a little Dijon mustard whisked into the eggs.
• Veggie-Loaded: Mushrooms, zucchini, and kale—just sauté well to reduce moisture. Add goat cheese for creaminess.
• Dairy-Light: Swap heavy cream for unsweetened almond milk and use less cheese.

  Add an extra egg for structure.

FAQ

Can I make this the night before?

Yes. Assemble everything except the cheese on top, cover, and refrigerate overnight. In the morning, sprinkle the remaining cheese and bake.

You may need to add 5–8 minutes to the bake time since it’s starting cold.

How do I keep it from getting watery?

Sauté high-moisture vegetables first, drain fat from meats, and avoid adding uncooked watery ingredients. Let the casserole rest after baking so excess steam escapes before slicing.

Can I use egg whites only?

You can replace some or all yolks with egg whites. For best texture and flavor, try 6 whole eggs plus 1 cup of egg whites instead of 10 whole eggs.

What’s the best cheese to use?

Cheddar is classic and melts well.

Monterey Jack, Swiss, pepper jack, or feta all work. For optimal melt, use a blend and grate cheese yourself for fewer additives.

How do I scale the recipe?

For a smaller batch, halve everything and use an 8×8-inch pan. For a larger group, add 4–6 eggs and proportionally increase other ingredients, then bake in a deeper dish and extend time as needed.

Is this keto-friendly?

Yes, as written it’s very low in carbs and fits a keto approach, especially if you use full-fat dairy and sugar-free sausage or bacon.

Can I make it vegetarian?

Absolutely.

Skip the meat and add extra veggies or a plant-based sausage. Make sure to sauté everything well to avoid excess moisture.

How long does it last in the fridge?

Up to four days when stored in an airtight container. Reheat gently to keep the texture soft.

Can I bake it in muffin tins?

Yes.

Grease well, fill each cup about 3/4 full, and bake at 350°F (175°C) for 16–20 minutes. Great for grab-and-go breakfasts.

What sides go well with it?

Try a simple green salad, sliced avocado, or roasted asparagus. If you’re not strictly low carb, add a small side of fruit.

Final Thoughts

This low carb egg casserole is the kind of recipe you’ll keep coming back to.

It’s easy, flexible, and dependable, whether you’re cooking for yourself or a crowd. With a few smart techniques—like sautéing veggies and not overbaking—you’ll get a tender, flavorful bake every time. Make it your own, swap in your favorites, and enjoy a steady, satisfying start to the day.