Spinach Mushroom Breakfast Casserole

Name: Spinach Mushroom Breakfast Casserole
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: American
Ingredients: 1 tablespoon olive oil; 450 grams cremini mushrooms, sliced; 4 cups packed spinach leaves; 3 cloves garlic, minced; Kosher salt, to taste; Freshly ground black pepper, to taste; 2 green onions, sliced; 115 grams goat cheese, divided; 18 large eggs; 120 millilitres milk; Freshly chopped chives, for garnish (optional)

Author: Amelia Sinclair

Published: January 21, 2026

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Introduction to Spinach Mushroom Breakfast Casserole

As a passionate home cook, I know mornings can be hustle-filled and chaotic, especially for busy moms and professionals. That’s why I’m excited to share my Spinach Mushroom Breakfast Casserole. This delightful dish is not only nutritious but also incredibly easy to whip up. Imagine waking up to a warm, hearty breakfast that’s ready to serve—a true game changer! Packed with vibrant spinach, earthy mushrooms, and tangy goat cheese, this casserole is just what you need for a quick, satisfying meal. Trust me; it’ll impress your loved ones and fuel your busy day ahead!

Why You’ll Love This Spinach Mushroom Breakfast Casserole

This Spinach Mushroom Breakfast Casserole is a breakfast hero! It’s fast to prepare, taking just 15 minutes before it goes into the oven. Plus, it’s versatile—you can customize it based on what’s in your fridge. The rich flavors of the mushrooms and goat cheese blend beautifully with the spinach, making every bite a taste sensation. Whether for a busy weekday or a cozy weekend brunch, this dish is bound to become a family favorite!

Ingredients for Spinach Mushroom Breakfast Casserole

Gathering scrumptious ingredients is half the fun of cooking! Here’s what you’ll need for this delightful Spinach Mushroom Breakfast Casserole:

Olive Oil: A healthy fat for sautéing the mushrooms, adding flavor as well.
Cremini Mushrooms: These earthy-hued gems lend a rich, savory taste to the dish.
Spinach Leaves: Fresh spinach is the star here, providing vibrant color and nutrients.
Garlic: Minced for aroma and depth, garlic elevates the taste to new heights.
Kosher Salt: Essential for seasoning and bringing out the flavors of the other ingredients.
Freshly Ground Black Pepper: A pinch adds a warm kick that wakes up your palate.
Green Onions: Sharp and slightly sweet, these are perfect for adding a crunch and a pop of color.
Goat Cheese: Creamy and tangy, goat cheese is a wonderful complement to the earthy mushrooms.
Large Eggs: The binder of the casserole, they provide richness and protein for a wholesome meal.
Milk: A splash helps create a fluffy texture, making every bite heavenly.
Chives: Optional, but they add freshness and a touch of elegance for garnishing.

Feel free to get creative with your ingredients! You can substitute goat cheese with feta or cheddar if you prefer. Add other vegetables like bell peppers or zucchini to the mix to amp up the flavors. For exact measurements, check out the bottom of the article where you can easily print the full recipe!

How to Make Spinach Mushroom Breakfast Casserole

Ready to dive into the deliciousness? Making this Spinach Mushroom Breakfast Casserole is a breeze, and I promise it’ll soon be a beloved part of your breakfast routine. Let’s get started with each essential step!

Preheat the Oven and Prepare the Dish

First things first! Preheat your oven to 175°C (350°F). This step ensures a perfectly baked casserole. While the oven warms up, grab a 23×33 cm baking dish and give it a light spray with nonstick spray. Preparing your dish ahead of time means the casserole won’t stick, making clean-up a snap!

Sauté the Vegetables

Once your oven is toasty, it’s time for the veggie magic! Heat a tablespoon of olive oil in a large skillet over high heat. Add the sliced cremini mushrooms, stirring for about three minutes until they soften and release their delicious flavor. Then toss in the fresh spinach and minced garlic. Sauté for another three minutes until the spinach wilts. Ah, that aroma is heavenly! Season with kosher salt and freshly ground black pepper to taste, adding layers of flavor to this hearty breakfast dish.

Layer the Ingredients

Now comes the fun part—layering! Spread the sautéed vegetable mixture evenly into your prepared baking dish. Next, sprinkle the sliced green onions over the top for a crunchy bite. Crumble half of the goat cheese across the vegetables; this creamy delight will melt beautifully as it cooks, enhancing each bite. Make sure the cheese is lovingly distributed to reap that tangy flavor everywhere!

Mix the Egg Mixture

In a large bowl, whisk together the large eggs and milk until well combined. This mixture is where it all comes together! Season with a pinch of salt and black pepper to elevate the flavors even more. Pour the egg mixture gently over the layered veggies and cheese, making sure it soaks in all the goodness. And don’t forget to crumble the remaining goat cheese on top—because who doesn’t love extra cheese?

Bake the Casserole

Time to bake! Place your casserole in the preheated oven and let it work its magic for about 30 to 40 minutes. You’ll know it’s done when the edges turn lightly golden and the eggs are fully set. Keep an eye on the beauty in your oven; the tantalizing smell will have everyone asking when breakfast is served!

Rest and Serve

Ah, the waiting game! Once your Spinach Mushroom Breakfast Casserole is out of the oven, let it rest for about five minutes. This time allows the flavors to meld beautifully. Then, cut it into portions that are easy to serve. For an inviting touch, garnish with freshly chopped chives. Your delightful breakfast is now ready to be enjoyed, with all the family gathered around the table!

Tips for Success

Prep your vegetables the night before to save time in the morning.
Experiment with different cheeses based on your family’s taste preferences.
For a spicy kick, add a pinch of red pepper flakes when sautéing.
Freeze leftovers in individual portions for easy reheating later.
Consider making mini casseroles in muffin tins for fun, single-serving breakfasts!

Equipment Needed

Baking dish (23×33 cm) – A casserole dish or any oven-safe dish works.
Large skillet – A non-stick frying pan is perfect for sautéing veggies.
Mixing bowl – Any large bowl will do for whisking eggs.
Whisk – A fork can also work in a pinch!
Measuring cups and spoons – Always handy for precise cooking.

Variations

For a heartier option, add cooked sausage or bacon for extra protein and flavor.
Swap the cremini mushrooms for baby bella or shiitake for a unique taste profile.
Use kale instead of spinach for a different leafy green that’s just as nutritious.
Make it dairy-free by substituting eggs with flaxseed meal and using a plant-based cheese.
Add sun-dried tomatoes or artichoke hearts for a Mediterranean twist!

Serving Suggestions for Spinach Mushroom Breakfast Casserole

Pair with fresh fruit salad for a refreshing and colorful side.
Serve with crispy breakfast potatoes or whole-grain toast for a hearty meal.
For drinks, consider mimosas or freshly brewed coffee to elevate your brunch.
Garnish with additional chives or a sprinkle of paprika for a lovely presentation!

FAQs about Spinach Mushroom Breakfast Casserole

Can I make this Spinach Mushroom Breakfast Casserole ahead of time?

Absolutely! This casserole can be prepared the night before and stored in the fridge. Just pop it in the oven in the morning for a quick breakfast.

What if I don’t have goat cheese on hand?

No worries! You can easily substitute it with feta or cheddar cheese, which will still provide a delightful flavor. Each offers a unique twist to the casserole.

How long will leftovers last in the fridge?

Leftovers are great! You can store them in an airtight container for up to three days. Just reheat in the microwave or oven for a speedy meal.

Can I freeze the Spinach Mushroom Breakfast Casserole?

Definitely! After baking and cooling, slice it into portions and freeze in airtight containers. This makes for a hearty breakfast that’s ready anytime!

Is this breakfast casserole suitable for kids?

Yes, it’s a kid-friendly dish! The flavors are mild and inviting, and you can customize the vegetables based on your child’s preferences, making it a hit at the breakfast table!

Final Thoughts

Every bite of this Spinach Mushroom Breakfast Casserole is like a warm embrace on a busy morning. It not only fuels your body, but it also nourishes your soul with comfort and familiarity. I love how it’s versatile, ready to adapt to whatever ingredients you have on hand. Whether you’re serving it for a special occasion or a simple weekday breakfast, it brings everyone together at the table. I hope this dish becomes a cherished part of your family’s breakfast routine, just as it has in mine. Let the deliciousness inspire your mornings!