Spinach Mushroom Breakfast Casserole

Highlighted under: Healthy & Light

This Spinach Mushroom Breakfast Casserole is a delicious and hearty way to start your day, packed with nutritious ingredients and bursting with flavor.

Anna

Created by

Anna

Last updated on 2025-12-23T01:50:28.487Z

This Spinach Mushroom Breakfast Casserole is a comforting dish that combines the earthy flavors of mushrooms with fresh spinach, all baked to perfection. It's perfect for brunches or meal prep!

Why You'll Love This Recipe

  • Nutritious and filling, perfect for a healthy breakfast
  • Easy to customize with your favorite vegetables
  • Great for feeding a crowd or for meal prep

A Hearty Start to Your Day

Breakfast is often touted as the most important meal of the day, and this Spinach Mushroom Breakfast Casserole certainly makes a strong case for that claim. Packed with wholesome ingredients like fresh spinach and mushrooms, this dish not only nourishes your body but also delights your taste buds. The combination of eggs and cheese creates a rich, satisfying texture that will keep you full throughout the morning.

Moreover, this casserole is incredibly versatile. You can swap out the spinach and mushrooms for whatever vegetables you have on hand. Try adding bell peppers, zucchini, or even some diced tomatoes for a burst of color and flavor. This adaptability makes it an excellent choice for families with varying tastes or dietary preferences.

Perfect for Meal Prep

One of the standout features of this Spinach Mushroom Breakfast Casserole is its meal prep potential. You can prepare it in advance, refrigerate, and then simply reheat it in the morning for a quick breakfast. This is especially convenient for busy weekdays when time is limited but you still want to enjoy a nutritious meal.

To make meal prep even easier, consider portioning the casserole into individual servings. This way, you can grab a slice on your way out the door without the hassle of cooking every morning. Plus, it’s a fantastic option for brunches or family gatherings, allowing you to feed a crowd without spending hours in the kitchen.

A Flavorful Twist on Tradition

Casseroles are a beloved breakfast staple, but this version offers a delightful twist on the traditional fare. The earthy flavors of sautéed mushrooms, combined with the freshness of spinach, create a harmonious blend that elevates your breakfast experience. Adding a sprinkle of cheese on top gives it that comforting, melty finish that everyone loves.

What sets this recipe apart is not just its flavor but also its health benefits. Spinach is rich in vitamins A, C, and K, while mushrooms provide essential nutrients like selenium and vitamin D. By incorporating these ingredients into your breakfast, you’re not just filling your belly; you’re also fueling your body with vital nutrients to kickstart your day.

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 teaspoon garlic powder
  • 1 teaspoon onion powder
  • Salt and pepper to taste
  • 1 tablespoon olive oil
  • 1 cup bread cubes (optional)

Make sure to use fresh ingredients for the best flavor!

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 the mushrooms and sauté until soft, about 5 minutes. Add the chopped spinach and cook until wilted.

Mix the Egg Mixture

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

Combine Ingredients

Stir the sautéed vegetables into the egg mixture. If desired, add bread cubes for extra texture.

Add Cheese

Pour the mixture into a greased baking dish and sprinkle shredded cheese on top.

Bake

Bake in the preheated oven for 30 minutes or until the casserole is set and the top is golden.

Let it cool for a few minutes before slicing.

Storage Tips

If you have leftovers from your Spinach Mushroom Breakfast Casserole, you can easily store them for later. Allow the casserole to cool completely before transferring it to an airtight container. It can be kept in the refrigerator for up to 4 days, making it a fantastic option for meal prep or busy weeks.

For longer storage, consider freezing individual portions. Wrap slices tightly in plastic wrap and place them in a freezer-safe bag. This way, you can enjoy a quick, nutritious breakfast even on the busiest days. Just reheat in the microwave or oven until heated through.

Serving Suggestions

While this casserole is delicious on its own, you can elevate your breakfast experience with some tasty sides. Consider serving it with a fresh fruit salad for a refreshing contrast to the richness of the dish. A dollop of Greek yogurt can also add a creamy texture and a boost of protein.

For a more indulgent treat, pair it with a drizzle of hot sauce or a sprinkle of fresh herbs like chives or parsley. These additions enhance the flavors and bring a fresh element to your meal, making breakfast even more enjoyable.

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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.

→ Is this recipe gluten-free?

You can make it gluten-free by omitting the bread or using gluten-free bread.

→ Can I freeze leftovers?

Yes, you can freeze the casserole. Just make sure to store it in an airtight container.

→ What can I substitute for cheese?

You can use a dairy-free cheese alternative or omit it entirely for a lighter version.

Spinach Mushroom Breakfast Casserole

This Spinach Mushroom Breakfast Casserole is a delicious and hearty way to start your day, packed with nutritious ingredients and bursting with flavor.

Prep Time15 minutes
Cooking Duration30 minutes
Overall Time45 minutes

Created by: Anna

Recipe Type: Healthy & Light

Skill Level: Intermediate

Final Quantity: 6 servings

What You'll Need

Casserole Ingredients

  1. 1 cup fresh spinach, chopped
  2. 1 cup mushrooms, sliced
  3. 6 large eggs
  4. 1 cup milk
  5. 1 cup shredded cheese (cheddar or mozzarella)
  6. 1 teaspoon garlic powder
  7. 1 teaspoon onion powder
  8. Salt and pepper to taste
  9. 1 tablespoon olive oil
  10. 1 cup bread cubes (optional)

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 the mushrooms and sauté until soft, about 5 minutes. Add the chopped spinach and cook until wilted.

Step 03

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

Step 04

Stir the sautéed vegetables into the egg mixture. If desired, add bread cubes for extra texture.

Step 05

Pour the mixture into a greased baking dish and sprinkle shredded cheese on top.

Step 06

Bake in the preheated oven for 30 minutes or until the casserole is set and the top is golden.

Nutritional Breakdown (Per Serving)

  • Calories: 320 kcal
  • Total Fat: 20g
  • Saturated Fat: 8g
  • Cholesterol: 210mg
  • Sodium: 400mg
  • Total Carbohydrates: 15g
  • Dietary Fiber: 2g
  • Sugars: 3g
  • Protein: 18g