Tired of the same old breakfast routine? Or maybe you're searching for a light, high-protein dinner that doesn't take hours to prepare? This delicious Spinach Egg Casserole is your new go-to solution. It's a powerhouse of flavor and nutrition, proving that simple ingredients can create something truly special. When it comes to versatile egg casserole recipes, this one is a true game-changer—perfectly suited for a busy weekday morning, a lazy weekend brunch, or even a satisfying weeknight meal.
This recipe is naturally low-carb, keto-friendly, and packed with greens. Plus, it’s a fantastic option for meal prep, giving you a healthy, grab-and-go meal for days. Let's bake something amazing!
Why You'll Love This Healthy Spinach Egg Casserole
- Incredibly Versatile: This is a fantastic spinach egg casserole for dinner or breakfast. It's a complete meal on its own but also pairs wonderfully with a side salad or a slice of toast.
- Meal Prep Champion: Bake it once and enjoy it all week. The flavors meld beautifully overnight, and it reheats in a snap for a quick and satisfying meal.
- Naturally Healthy & Keto-Friendly: With no bread and packed with protein and veggies, this is one of those egg casseroles without bread that fits perfectly into a healthy, low-carb, or keto lifestyle.
- Effortlessly Easy: With minimal prep and straightforward steps, this is an easy spinach egg dish that delivers impressive results without the stress.
Ingredients You'll Need
This recipe uses simple, wholesome ingredients to create a rich and savory bake.
- Eggs: 12 large eggs form the fluffy, protein-rich base.
- Fresh Spinach: 12 ounces of fresh spinach, wilted down to pack a nutritious punch.
- Mozzarella Cheese: 2 cups of shredded mozzarella cheese. For a dairy-free version, see our tips below!
- Green Onions: ½ cup of thinly sliced green onions adds a mild, fresh bite.
- Olive Oil: 2 teaspoons for wilting the spinach.
- Seasoning: 2 teaspoons of your favorite all-purpose seasoning (like Spike or a simple salt-free blend).
- Black Pepper: Freshly ground, to taste.
Step-by-Step Instructions
Follow these simple steps to create the perfect savory egg bake.
Preheat and Prep: First, preheat your oven to 375°F (190°C). Generously grease a 9×13 inch baking dish with nonstick spray or a light coating of oil to prevent sticking.
Sauté the Spinach: In a large skillet, heat the olive oil over medium heat. Add the entire batch of fresh spinach and stir frequently for about 2-3 minutes, just until it has wilted completely.
Create the Base Layer: Drain any excess liquid from the spinach. Transfer the wilted spinach to your prepared baking dish and spread it evenly across the bottom.
Layer the Flavors: Sprinkle the shredded mozzarella cheese and sliced green onions evenly over the spinach. Season this layer with your all-purpose seasoning and a few grinds of black pepper.
Whisk the Eggs: In a large mixing bowl, crack all 12 eggs and whisk them vigorously until the yolks and whites are fully combined and slightly frothy.
Combine and Bake: Pour the beaten eggs evenly over the spinach and cheese mixture in the dish. Use a fork to gently mix everything together, ensuring all the ingredients are well-distributed.
Bake to Perfection: Place the casserole dish in the preheated oven. Bake for 25-30 minutes, or until the center is set and the top is lightly golden brown. You can check for doneness by inserting a knife into the center; it should come out clean.
Rest and Serve: Remove the casserole from the oven and let it cool for at least 5 minutes. This allows it to set firmly, making it easier to slice. Cut into squares and serve warm.
Tips and Variations for the Best Egg Casserole Recipes
How to Make a No-Cheese Breakfast Casserole
For a delicious dairy-free or no cheese breakfast casserole, simply omit the mozzarella. To add a savory, cheesy flavor without the dairy, sprinkle 2-3 tablespoons of nutritional yeast over the spinach layer along with your other seasonings. You may want to add a pinch more salt to compensate.
Ingredient Substitutions and Add-ins
- Greens: Out of fresh spinach? A 10-ounce package of frozen spinach works great! Just be sure to thaw it completely and squeeze out all the excess water before adding it to the dish.
- Add Protein: Make it even more hearty by adding 1 cup of cooked, crumbled sausage, bacon, or diced ham.
- More Veggies: Feel free to add sautéed mushrooms, diced bell peppers, or onions for extra flavor and nutrients.
- Different Cheeses: Swap the mozzarella for sharp cheddar, nutty Gruyère, or tangy feta cheese for a different flavor profile.
Storing and Reheating
This spinach egg casserole is perfect for making ahead.
Storing
Once completely cooled, cover the baking dish tightly with plastic wrap or foil, or transfer individual slices to an airtight container. Refrigerate for up to 4 days.
Reheating
For a quick breakfast, simply place a slice on a microwave-safe plate and heat for 60-90 seconds, or until warmed through. Be careful not to overheat, as this can make the eggs rubbery. You can also reheat slices in a toaster oven or air fryer for a slightly crispier edge.
Easy Cheesy Spinach Egg Casserole Bake
Ingredients
- 12 large eggs
- 12 oz fresh spinach
- 2 cups shredded mozzarella cheese
- 1/2 cup green onions thinly sliced
- 2 tsp olive oil
- 2 tsp all-purpose seasoning
- freshly ground black pepper to taste
Instructions
- Preheat your oven to 375°F (190°C). Prepare a 9x13 inch casserole dish by coating it with nonstick cooking spray.
- Heat olive oil in a large skillet over medium heat. Sauté the fresh spinach, stirring constantly, for approximately 2 minutes until it has completely wilted. Spread the wilted spinach evenly across the bottom of the prepared dish.
- Layer the shredded mozzarella cheese and thinly sliced green onions directly over the spinach. Season generously with all-purpose seasoning and black pepper to taste.
- In a large bowl, whisk the eggs until they are well-combined and airy. Pour the egg mixture evenly over the layers in the casserole dish.
- Bake for 25-30 minutes, or until the egg mixture is fully set and the top begins to turn a light golden brown. Let the casserole rest for 5 minutes before slicing.
- Serve the spinach egg casserole hot. Store any leftovers in an airtight container in the refrigerator and reheat in the microwave for a quick and easy meal.
Equipment
- 9x13 inch casserole dish
- Large Skillet
- Mixing bowl
