Spinach Mushroom Breakfast Casserole

Highlighted under: Cozy Comfort Meals

A delightful blend of spinach and mushrooms makes this breakfast casserole a nourishing start to your day.

Lena

Created by

Lena

Last updated on 2025-12-23T01:16:29.553Z

This Spinach Mushroom Breakfast Casserole is the perfect dish for brunch gatherings or a cozy family breakfast. Packed with nutrients and flavor, it's sure to satisfy everyone at the table!

Why You Will Love This Recipe

  • Rich in vitamins and minerals from fresh spinach and mushrooms
  • Comforting and hearty, perfect for any meal of the day
  • Easy to prepare and can be made ahead of time

Nutritional Benefits

This Spinach Mushroom Breakfast Casserole is not just delicious; it's also packed with essential nutrients. Spinach is a powerhouse of vitamins A, C, and K, along with iron and folate. These nutrients support immune function and promote healthy skin. Meanwhile, mushrooms add a rich source of antioxidants and B vitamins, which are vital for energy production and maintaining a healthy nervous system.

Incorporating this casserole into your breakfast routine can help you meet your daily vegetable intake effortlessly. The combination of eggs and cheese adds a good balance of protein and fats, keeping you full and satisfied. It's an excellent way to fuel your day, whether you’re heading to work or enjoying a leisurely weekend brunch.

Versatility of the Casserole

One of the best things about this breakfast casserole is its versatility. You can easily customize it by adding other vegetables like bell peppers, zucchini, or even some diced tomatoes for a pop of color and flavor. This adaptability makes it a great dish for using up any leftover veggies you have in your fridge.

Additionally, the casserole can be tailored to suit various dietary preferences. For a vegetarian option, simply omit any meat ingredients. If you’re looking for a gluten-free version, substitute the bread with gluten-free alternatives or use quinoa for a nutritious twist. This makes it a fantastic choice for gatherings or meal prep, catering to a variety of tastes.

Perfect for Meal Prep

This Spinach Mushroom Breakfast Casserole is a fantastic option for meal prep. It can be made ahead of time and stored in the refrigerator or freezer, so you can enjoy a hearty breakfast throughout the week. Simply prepare the casserole, bake it, and allow it to cool before slicing it into portions. Store in airtight containers for convenient grab-and-go meals.

When you're ready to enjoy it, just reheat a slice in the microwave or oven. This not only saves time during busy mornings but also ensures you have a nourishing meal ready to fuel your day. It's an easy way to maintain a healthy eating routine without the hassle of daily cooking.

Ingredients

Ingredients

Casserole Ingredients

  • 2 cups fresh spinach, chopped
  • 1 cup mushrooms, sliced
  • 6 large eggs
  • 1 cup milk
  • 1 cup shredded cheese (cheddar or your choice)
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1/2 teaspoon garlic powder
  • 1/2 teaspoon onion powder
  • 2 cups bread cubes (stale bread works best)

Combine all ingredients in a large mixing bowl before transferring to a baking dish.

Instructions

Instructions

Preheat the Oven

Preheat your oven to 350°F (175°C).

Prepare the Mixture

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

Add Vegetables and Bread

Stir in the chopped spinach, sliced mushrooms, cheese, and bread cubes until everything is well combined.

Transfer to Baking Dish

Grease a 9x13 inch baking dish and pour the mixture into the dish.

Bake

Bake in the preheated oven for 35-40 minutes, or until the top is golden and the eggs are set.

Cool and Serve

Allow to cool for a few minutes before slicing and serving.

Enjoy your delicious Spinach Mushroom Breakfast Casserole warm!

Storage Tips

To keep your Spinach Mushroom Breakfast Casserole fresh, store it in an airtight container in the refrigerator for up to four days. If you want to keep it longer, consider freezing individual portions. Wrap each slice in plastic wrap and then place them in a freezer-safe bag. This way, you can enjoy your homemade casserole for up to three months without sacrificing quality.

When reheating frozen portions, it's best to thaw them overnight in the refrigerator. This ensures even heating and helps maintain the casserole's texture. You can then warm it in the microwave or oven until heated through, making it a convenient meal option anytime.

Serving Suggestions

This casserole pairs beautifully with a side of fresh fruit or a light salad for a balanced breakfast or brunch experience. Adding a dollop of Greek yogurt or a sprinkle of fresh herbs like parsley or chives can elevate the dish, adding a refreshing touch and extra flavor.

For a heartier meal, consider serving it alongside crispy bacon or breakfast sausage. This combination can satisfy even the heartiest appetites, making it a perfect dish for family gatherings or brunch parties. With its comforting flavors and textures, this casserole is sure to impress your guests.

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Questions About Recipes

→ Can I make this casserole ahead of time?

Yes, you can prepare it the night before and refrigerate it. Just add a few extra minutes to the baking time.

→ What can I substitute for the bread?

You can use gluten-free bread or even cooked quinoa for a different texture.

→ Can I use frozen spinach?

Yes, just make sure to thaw and drain the excess water before using it in the recipe.

→ How do I store leftovers?

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

Spinach Mushroom Breakfast Casserole

A delightful blend of spinach and mushrooms makes this breakfast casserole a nourishing start to your day.

Prep Time20 minutes
Cooking Duration40 minutes
Overall Time60 minutes

Created by: Lena

Recipe Type: Cozy Comfort Meals

Skill Level: Easy

Final Quantity: 6 servings

What You'll Need

Casserole Ingredients

  1. 2 cups fresh spinach, chopped
  2. 1 cup mushrooms, sliced
  3. 6 large eggs
  4. 1 cup milk
  5. 1 cup shredded cheese (cheddar or your choice)
  6. 1 teaspoon salt
  7. 1/2 teaspoon black pepper
  8. 1/2 teaspoon garlic powder
  9. 1/2 teaspoon onion powder
  10. 2 cups bread cubes (stale bread works best)

How-To Steps

Step 01

Preheat your oven to 350°F (175°C).

Step 02

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

Step 03

Stir in the chopped spinach, sliced mushrooms, cheese, and bread cubes until everything is well combined.

Step 04

Grease a 9x13 inch baking dish and pour the mixture into the dish.

Step 05

Bake in the preheated oven for 35-40 minutes, or until the top is golden and the eggs are set.

Step 06

Allow to cool for a few minutes before slicing and serving.

Nutritional Breakdown (Per Serving)

  • Calories: 300 kcal
  • Total Fat: 18g
  • Saturated Fat: 8g
  • Cholesterol: 220mg
  • Sodium: 650mg
  • Total Carbohydrates: 20g
  • Dietary Fiber: 2g
  • Sugars: 3g
  • Protein: 15g