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: 6 large eggs; 1 cup milk; 2 cups fresh spinach, chopped; 1 cup mushrooms, sliced; 1 cup shredded cheese (cheddar or mozzarella); 1/2 cup diced onion; 1 teaspoon garlic powder; Salt and pepper to taste; 1 teaspoon olive oil; 1 teaspoon dried herbs (optional)

Highlighted under: Homestyle Meals

A hearty and nutritious breakfast casserole packed with spinach, mushrooms, and eggs, perfect for brunch or meal prep.

Created by

Emma Johnson

Last updated on 2025-12-23T01:57:28.171Z

This Spinach Mushroom Breakfast Casserole is a delicious way to start your day. It's not only packed with nutrients but also incredibly easy to prepare. You can make it ahead of time and reheat it for a quick breakfast during the week.

        Why You'll Love This Recipe
        Loaded with nutrient-rich spinach and savory mushrooms
Great for meal prep or feeding a crowd
Versatile and can be customized with your favorite vegetables
Comforting and satisfying, perfect for any breakfast or brunch occasion

      

Nutritional Benefits

This Spinach Mushroom Breakfast Casserole is not only delicious but also packed with essential nutrients. Spinach, a superfood, is rich in iron, vitamins A and C, and antioxidants, making it a fantastic choice for a healthy start to your day. Mushrooms add a savory depth to the dish while providing a good source of B vitamins and selenium, which are vital for energy production and immune support.

The combination of eggs and milk offers a protein boost, keeping you full and satisfied throughout the morning. With its remarkable balance of flavors and nutrients, this casserole is a wonderful way to kickstart your day with energy and vitality.

Meal Prep Made Easy

One of the best features of this breakfast casserole is its suitability for meal prep. Preparing this dish in advance saves time during busy mornings. You can easily make it the night before, refrigerate it, and simply reheat individual portions in the microwave or oven. This makes it a practical choice for families or anyone with a tight schedule.

Additionally, this casserole can be frozen for longer storage. Just slice it into portions, wrap securely, and store in the freezer. When you're ready to enjoy, thaw and reheat for a quick and satisfying meal that doesn’t compromise on taste or nutrition.

Customization Options

One of the greatest things about this breakfast casserole is its versatility. Feel free to customize it with your favorite vegetables or proteins. Bell peppers, zucchini, or even cooked sausage can be great additions. This allows you to tailor the dish to your personal taste or to use up any leftover veggies in your fridge.

You can also experiment with different types of cheese to create a unique flavor profile. Whether you prefer the sharpness of cheddar or the creaminess of mozzarella, the choice is yours. This makes the Spinach Mushroom Breakfast Casserole a delightful canvas for culinary creativity.

Ingredients

Casserole Ingredients

6 large eggs
1 cup milk
2 cups fresh spinach, chopped
1 cup mushrooms, sliced
1 cup shredded cheese (cheddar or mozzarella)
1/2 cup diced onion
1 teaspoon garlic powder
Salt and pepper to taste
1 teaspoon olive oil
1 teaspoon dried herbs (optional)

Mix and match ingredients as you like to make this dish your own!

Instructions

Preheat and Sauté

Preheat your oven to 350°F (175°C). In a skillet, heat olive oil over medium heat. Add diced onion and sliced mushrooms, and sauté until softened, about 5 minutes.

Prepare the Egg Mixture

In a large bowl, whisk together the eggs, milk, garlic powder, salt, pepper, and dried herbs if using. Stir in the chopped spinach and sautéed vegetables.

Combine and Bake

Pour the egg mixture into a greased 9x13 inch baking dish. Sprinkle the shredded cheese on top. Bake in the preheated oven for 30 minutes, or until the center is set and the top is golden.

Cool and Serve

Allow the casserole to cool for a few minutes before slicing. Serve warm and enjoy!

Feel free to add toppings like avocado or salsa for an extra kick!

Serving Suggestions

This casserole pairs wonderfully with a variety of sides, making it a perfect centerpiece for brunch gatherings. Consider serving it alongside fresh fruit, a simple green salad, or even some crispy bacon for a heartier meal. A dollop of sour cream or a sprinkle of fresh herbs on top can elevate the flavors even further.

For a complete brunch experience, serve with a refreshing beverage like freshly squeezed orange juice or a rich cup of coffee. These accompaniments not only complement the dish but also enhance the overall dining experience.

Storage Tips

To ensure your Spinach Mushroom Breakfast Casserole stays fresh, store any leftovers in an airtight container in the refrigerator. It will keep well for about 3-4 days. Just be sure to reheat thoroughly before serving to enjoy it at its best.

If you decide to freeze portions, wrap them tightly in plastic wrap or aluminum foil, then place them in a freezer-safe bag. Properly stored, they can last up to 2-3 months. This way, you can always have a delicious and nutritious breakfast option ready to go.

Why Breakfast Matters

Breakfast is often touted as the most important meal of the day, and for good reason. A hearty breakfast helps to jumpstart your metabolism and provides the energy needed to tackle your day. Including protein, healthy fats, and fiber in your morning meal can help maintain steady energy levels and keep hunger at bay throughout the morning.

Moreover, taking the time to enjoy a nutritious breakfast can set a positive tone for the day ahead. It encourages mindful eating habits and establishes a routine that prioritizes health and well-being, making dishes like this Spinach Mushroom Breakfast Casserole an excellent choice.

Questions About Recipes

→ Can I prepare this casserole in advance?

Yes, you can assemble the casserole the night before and store it in the fridge until ready to bake.

→ Can I freeze leftovers?

Yes, this casserole freezes well. Just make sure to wrap it tightly to prevent freezer burn.

→ What other vegetables can I add?

You can add bell peppers, zucchini, or even cooked sausage for added flavor.

→ Is this recipe gluten-free?

Yes, this recipe is naturally gluten-free as it contains no bread or flour.