Spinach Mushroom Breakfast Casserole

Name: Spinach Mushroom Breakfast Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 8 servings
Ingredients: 1 cup fresh spinach, chopped; 1 cup mushrooms, sliced; 6 large eggs; 1 cup milk; 1 cup shredded cheese (cheddar or mozzarella); 1/2 teaspoon salt; 1/4 teaspoon black pepper; 1/4 teaspoon garlic powder; 1/4 teaspoon onion powder; 1 cup bread cubes (optional)

Highlighted under: Comfort Food Recipes

A hearty and delicious Spinach Mushroom Breakfast Casserole, perfect for weekend brunch or meal prep for the week ahead.

Created by

Emma Johnson

Last updated on 2025-12-22T21:52:28.422Z

This Spinach Mushroom Breakfast Casserole is a delightful blend of fresh spinach, savory mushrooms, and creamy eggs. It's an easy dish to prepare and is perfect for feeding a crowd on a lazy Sunday morning. Serve it with a side of fresh fruit or toast for a complete meal.

        Why You'll Love This Recipe
        Packed with nutritious vegetables for a healthy start to your day
Easy to prepare and can be made ahead of time
Versatile – customize with your favorite ingredients like cheese or herbs

      

A Nutritious Start to Your Day

Breakfast is often referred to as the most important meal of the day, and this Spinach Mushroom Breakfast Casserole exemplifies that notion perfectly. With its vibrant mix of fresh spinach and earthy mushrooms, this dish not only tantalizes your taste buds but also packs a nutritional punch. Spinach is loaded with vitamins A, C, and K, along with iron and calcium, while mushrooms offer essential B vitamins and antioxidants. Together, they create a wholesome foundation for a healthy breakfast that will energize you throughout the day.

Incorporating vegetables into your morning routine can significantly improve your overall health. By enjoying this casserole, you are ensuring that you start your day with plenty of fiber and nutrients. This fiber-rich meal can promote better digestion and keep you feeling full longer, making it an excellent choice for those looking to manage their weight or maintain a balanced diet.

Perfect for Meal Prep

One of the standout features of this breakfast casserole is its ability to be made ahead of time. Whether you’re busy with work, family commitments, or simply want to make mornings easier, this recipe allows for meal prep flexibility. You can prepare it the night before, store it in the refrigerator, and bake it fresh in the morning. Not only does this save time, but it also ensures you have a delicious and nutritious breakfast ready to go.

To reheat, simply slice the casserole into portions and warm it in the microwave or oven. It stays moist and flavorful, making it an ideal option for busy weekdays. This means you can enjoy a hearty breakfast without the fuss of cooking each morning, allowing you to focus on what truly matters.

Customize to Your Taste

One of the beauties of the Spinach Mushroom Breakfast Casserole is its versatility. You can easily tailor this dish to suit your preferences or dietary needs. Want to add some protein? Consider mixing in cooked bacon, sausage, or even tofu. Prefer a different flavor profile? Experiment with various cheeses like feta or pepper jack for a spicy kick. You can also throw in different vegetables such as bell peppers or zucchini to further enhance the nutrient content and add color to your dish.

Herbs and spices can also elevate the flavor to new heights. Fresh herbs like basil, thyme, or parsley can add brightness, while spices such as paprika or chili powder can introduce a delightful warmth. The possibilities are endless, making this casserole a fantastic base for culinary creativity.

Ingredients

Casserole Ingredients

1 cup fresh spinach, chopped
1 cup mushrooms, sliced
6 large eggs
1 cup milk
1 cup shredded cheese (cheddar or mozzarella)
1/2 teaspoon salt
1/4 teaspoon black pepper
1/4 teaspoon garlic powder
1/4 teaspoon onion powder
1 cup bread cubes (optional)

Feel free to mix in other vegetables or proteins like bell peppers or cooked sausage.

Instructions

Preheat the Oven

Preheat your oven to 350°F (175°C).

Sauté the Vegetables

In a skillet, sauté the mushrooms until they are golden brown. Add the spinach and cook until wilted. Set aside.

Whisk the Eggs

In a large bowl, whisk together the eggs, milk, salt, pepper, garlic powder, and onion powder until well combined.

Combine Ingredients

Add the sautéed vegetables and bread cubes (if using) to the egg mixture. Mix well and pour into a greased baking dish.

Add Cheese

Sprinkle the shredded cheese on top of the casserole.

Bake

Bake in the preheated oven for 30 minutes, or until the eggs are set and the top is golden brown.

Serve

Let the casserole cool slightly before slicing. Serve warm and enjoy!

This casserole can be stored in the refrigerator for up to 3 days.

Serving Suggestions

This Spinach Mushroom Breakfast Casserole is delicious on its own, but there are several ways to elevate your meal. Consider serving it alongside a fresh fruit salad or a dollop of Greek yogurt for added creaminess and flavor. A light drizzle of balsamic glaze can also complement the earthy tones of the mushrooms beautifully.

For a heartier brunch, pair it with crispy bacon or turkey sausage. This balance of flavors and textures will impress your family and friends at your weekend gathering.

Storage and Reheating Tips

Proper storage is key to maintaining the freshness of your casserole. Once it has cooled, cover it tightly with plastic wrap or aluminum foil and store it in the refrigerator for up to four days. If you want to keep it longer, consider freezing individual portions. Just make sure to use freezer-safe containers to prevent freezer burn.

To reheat, simply thaw any frozen portions overnight in the refrigerator and warm in the oven at 350°F (175°C) until heated through. This makes for a quick and easy breakfast option that you can enjoy any day of the week.

Nutritional Benefits

This breakfast casserole is not only delicious but also packed with health benefits. With a combination of eggs, milk, and cheese, it provides a good source of protein, which is essential for muscle repair and growth. The addition of spinach and mushrooms contributes important vitamins and minerals that support overall health.

Moreover, the fiber from the vegetables and bread cubes (if used) aids in digestion and contributes to a feeling of fullness, making it a great choice for those looking to maintain a balanced diet while enjoying a hearty meal.

Questions About Recipes

→ Can I make this casserole ahead of time?

Yes, you can prepare it the night before and bake it in the morning.

→ What other vegetables can I add?

You can add bell peppers, zucchini, or any other favorite vegetables.

→ Can I use egg substitutes for this recipe?

Yes, you can use egg substitutes or silken tofu for a vegan version.

→ How do I store leftovers?

Store leftovers in an airtight container in the refrigerator for up to 3 days.