Spinach Mushroom Breakfast Casserole

Highlighted under: Cozy Bowls

A delicious and hearty Spinach Mushroom Breakfast Casserole that combines nutritious greens with earthy mushrooms, perfect for a wholesome start to your day.

Anna

Created by

Anna

Last updated on 2025-12-22T22:10:28.759Z

This Spinach Mushroom Breakfast Casserole is not only easy to prepare, but it also makes for a fantastic brunch dish. Filled with fresh spinach, savory mushrooms, and cheesy goodness, it's sure to satisfy everyone at the table.

Why You'll Love This Recipe

  • Packed with nutritious spinach and mushrooms for a healthy start.
  • Easy to prepare and can be made ahead of time.
  • Versatile - customize with your favorite ingredients.

The Perfect Breakfast Option

Breakfast is often touted as the most important meal of the day, and this Spinach Mushroom Breakfast Casserole is a delightful way to start your morning. Not only is it packed with protein from the eggs and cheese, but the addition of fresh spinach and mushrooms provides essential vitamins and minerals. Each bite offers a blend of flavors and textures that will satisfy your taste buds and keep you energized throughout the day.

This casserole is particularly appealing for busy mornings. You can prepare it ahead of time and simply reheat it when you're ready to eat. It’s a great option for families, brunch gatherings, or meal prep. The dish can be served warm or at room temperature, making it a flexible choice for any occasion.

Customization and Variations

One of the best aspects of this casserole is its versatility. You can easily customize it with your favorite ingredients. If you're a fan of different vegetables, consider adding bell peppers, zucchini, or even artichokes. For a heartier version, you might include cooked sausage or bacon. The choice of cheese is also flexible; try feta for a tangy twist or mozzarella for a milder flavor.

Additionally, this recipe can be tailored to accommodate dietary preferences. For a dairy-free option, substitute the milk and cheese with plant-based alternatives. You can also make it gluten-free by ensuring that any additional ingredients you use are certified gluten-free. This adaptability makes the casserole a fantastic dish to serve for various dietary needs.

Storage and Reheating Tips

If you find yourself with leftovers, storing them is simple. Allow the casserole to cool completely before covering it with plastic wrap or transferring it to an airtight container. It can be stored in the refrigerator for up to five days, making it a great option for meal prep. When you're ready to enjoy the leftovers, simply reheat individual portions in the microwave or warm it in the oven until heated through.

For longer storage, consider freezing the casserole. Cut it into portions and wrap them tightly before placing them in the freezer. It can be frozen for up to three months. When you're ready to enjoy a slice, thaw it overnight in the refrigerator, then reheat as desired. This makes it an incredibly convenient dish for busy weeks ahead.

Ingredients

Casserole Ingredients

  • 6 large eggs
  • 1 cup milk
  • 2 cups spinach, fresh
  • 1 cup mushrooms, sliced
  • 1 cup shredded cheese (cheddar or your choice)
  • 1/2 cup onion, chopped
  • 1 teaspoon garlic powder
  • Salt and pepper to taste
  • 1 tablespoon olive oil

Feel free to add other vegetables or meats to personalize your casserole!

Instructions

Preheat the Oven

Preheat your oven to 350°F (175°C).

Sauté the Vegetables

In a skillet, heat olive oil over medium heat. Add chopped onions and sliced mushrooms, cooking until softened. Stir in fresh spinach and cook until wilted.

Prepare the Egg Mixture

In a large bowl, whisk together eggs, milk, garlic powder, salt, and pepper.

Combine Ingredients

Add the sautéed vegetables and shredded cheese to the egg mixture and stir until well combined.

Bake the Casserole

Pour the mixture into a greased baking dish and bake for 30 minutes, or until the eggs are set and the top is golden.

Serve

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

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

Nutritional Benefits

This Spinach Mushroom Breakfast Casserole is not only delicious but also nutrient-dense. Spinach is a powerhouse of vitamins A, C, and K, along with iron and calcium, making it an excellent addition to your breakfast. Mushrooms add flavor and are low in calories while providing a good source of B vitamins and antioxidants. Together, these ingredients create a healthy dish that supports overall well-being.

Including a balanced breakfast like this casserole can help regulate your energy levels and keep you fuller for longer. The blend of protein from the eggs and cheese, along with fiber from the vegetables, makes it a satisfying meal that can help prevent mid-morning cravings.

Serving Suggestions

To make your breakfast experience even more delightful, consider serving the casserole with a side of fresh fruit or a light salad. A dollop of Greek yogurt or a sprinkle of fresh herbs, such as chives or parsley, can elevate the dish even further. These additions not only enhance the flavor but also add extra nutrition to your meal.

For those who enjoy a little kick, serve the casserole with a side of hot sauce or salsa. This can give your breakfast a flavorful twist, making it even more exciting. Pairing it with a warm cup of coffee or herbal tea can create a comforting breakfast atmosphere, perfect for a slow weekend morning or a busy weekday.

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Questions About Recipes

→ Can I make this casserole ahead of time?

Yes, you can prepare the casserole the night before, cover it, and refrigerate. Just bake it in the morning!

→ What other vegetables can I add?

Feel free to add bell peppers, zucchini, or even chopped tomatoes for extra flavor.

→ Can I freeze leftovers?

Yes, this casserole freezes well. Just wrap it tightly and store for up to 2 months.

→ Is it gluten-free?

Yes, this recipe is naturally gluten-free as long as you use gluten-free cheese.

Spinach Mushroom Breakfast Casserole

A delicious and hearty Spinach Mushroom Breakfast Casserole that combines nutritious greens with earthy mushrooms, perfect for a wholesome start to your day.

Prep Time15 minutes
Cooking Duration30 minutes
Overall Time45 minutes

Created by: Anna

Recipe Type: Cozy Bowls

Skill Level: Easy

Final Quantity: 6 servings

What You'll Need

Casserole Ingredients

  1. 6 large eggs
  2. 1 cup milk
  3. 2 cups spinach, fresh
  4. 1 cup mushrooms, sliced
  5. 1 cup shredded cheese (cheddar or your choice)
  6. 1/2 cup onion, chopped
  7. 1 teaspoon garlic powder
  8. Salt and pepper to taste
  9. 1 tablespoon olive oil

How-To Steps

Step 01

Preheat your oven to 350°F (175°C).

Step 02

In a skillet, heat olive oil over medium heat. Add chopped onions and sliced mushrooms, cooking until softened. Stir in fresh spinach and cook until wilted.

Step 03

In a large bowl, whisk together eggs, milk, garlic powder, salt, and pepper.

Step 04

Add the sautéed vegetables and shredded cheese to the egg mixture and stir until well combined.

Step 05

Pour the mixture into a greased baking dish and bake for 30 minutes, or until the eggs are set and the top is golden.

Step 06

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

Nutritional Breakdown (Per Serving)

  • Calories: 250 kcal
  • Total Fat: 18g
  • Saturated Fat: 7g
  • Cholesterol: 210mg
  • Sodium: 300mg
  • Total Carbohydrates: 6g
  • Dietary Fiber: 1g
  • Sugars: 2g
  • Protein: 18g