You know those mornings when you need something hearty, delicious, and ready to go? That’s where my spinach and feta breakfast casserole comes in. I’ve been making this for years—ever since my friend Lisa showed up unannounced for brunch and I had to throw something together fast. Now it’s my go-to dish for lazy Sundays, busy weekdays, and everything in between. The best part? You probably have most of these ingredients in your fridge already.

Why You’ll Love This Spinach and Feta Breakfast Casserole

• Protein powerhouse: With six eggs and feta, it keeps you full till lunch
• 5-minute prep: Just mix and bake – perfect for sleepy mornings
• Endlessly customizable: Add mushrooms, swap cheeses, or throw in leftover veggies
• Vegetarian-friendly: A meatless option that even carnivores love
• Meal prep champ: Makes great leftovers for quick breakfasts all week

Ingredients for Spinach and Feta Breakfast Casserole

Gather these simple ingredients – I bet you have most already! The magic happens when they all come together. Here’s what you’ll need:

• 6 large eggs (room temperature blends better)
• 1 cup whole milk (2% works too, but whole makes it extra creamy)
• 2 cups fresh spinach, chopped (pack it lightly – no need to measure perfectly)
• 1 cup crumbled feta cheese (buy the block and crumble yourself for best flavor)
• 1/2 teaspoon salt (I use kosher – it distributes better)
• 1/4 teaspoon black pepper (freshly cracked if you have it)

1 tablespoon olive oil (for greasing the dish)

That’s it! No fancy ingredients here – just good, simple stuff that makes an amazing breakfast. We’ll talk substitutions later if you need them, but trust me, this combination is perfect as-is.

How to Make Spinach and Feta Breakfast Casserole

Okay, let’s get cooking! This is seriously one of the easiest recipes in my breakfast rotation. I’ve made it so many times I could probably do it in my sleep (and honestly, I practically have on some extra-early mornings). Here’s how it all comes together:

1. Preheat your oven to 375°F (190°C) – no need to wait for it to fully heat before starting, but get that going first.
2. Grease your baking dish with that olive oil – I use an 8×8 square dish, but whatever you have that holds about 2 quarts works. A quick swipe with your fingers or a paper towel does the trick.
3. Whisk eggs and milk in a big bowl until fully combined. Don’t overdo it – just until you don’t see streaks of yolk anymore.
4. Add everything else – the spinach, feta, salt and pepper. Gently fold it all together. The spinach will wilt a bit as it bakes, so don’t worry if it seems like a lot at first.
5. Pour into your dish and bake for 30-35 minutes. You’ll know it’s done when the edges are golden and the center barely jiggles when you shake the pan.

Tips for the Best Spinach and Feta Breakfast Casserole

• Squeeze dry: If using frozen spinach, wring it out in a clean towel – nobody wants a watery casserole!
• Rest time: Let it sit 5 minutes after baking – it sets perfectly and won’t fall apart when slicing.
• Toothpick test: Not sure if it’s done? The toothpick should come out clean (maybe with a few moist crumbs, but no wet egg).

Ingredient Substitutions and Variations

One of my favorite things about this casserole is how flexible it is! Don’t have spinach? No problem – kale works beautifully (just chop it finer). Out of feta? Cottage cheese adds a lovely creamy texture, or try shredded mozzarella for a milder flavor. I’ve thrown in all sorts of extras too – sun-dried tomatoes for a tangy punch, sautéed mushrooms for earthiness, or even a handful of diced ham when I’m feeling fancy. The basic recipe is just the starting point – make it your own!

Storing and Reheating Spinach and Feta Breakfast Casserole

Here’s the beautiful thing about this casserole – it tastes just as good reheated as it does fresh from the oven! I always make extra because it keeps so well. For the fridge, just cover it tightly with plastic wrap or transfer slices to an airtight container – it’ll stay perfect for 3 days. When you’re ready to eat, pop individual portions in the microwave for about 30 seconds or warm slices in a 350°F oven for 10 minutes until heated through. Want to freeze it? That works too! Slice it up, separate pieces with parchment paper so they don’t stick together, and freeze in a resealable bag for up to 2 months. Easy peasy!

Nutritional Information

Here’s the scoop on what you’re eating – remember these are estimates since brands and exact measurements vary. Per generous slice (about 1/6 of the casserole), you’re looking at around 220 calories, 14g protein, and 5g carbs. The feta gives you a good dose of calcium, while the spinach packs in iron and vitamins. Not bad for something that tastes this good, right?

Common Questions About Spinach and Feta Breakfast Casserole

I get asked about this recipe all the time – here are the most common questions with my tried-and-true answers:

Can I use frozen spinach? Absolutely! Just thaw it completely first, then squeeze out every drop of water with your hands or a clean towel. You’ll need about 10 ounces frozen to equal 2 cups fresh.

How to make it dairy-free? Swap the milk for unsweetened almond or oat milk, and use dairy-free feta (I like the Violife brand). The texture changes slightly but still tastes amazing!

Can I prep it overnight? You bet! Mix everything except the eggs the night before. In the morning, whisk in the eggs, pour into your dish, and bake – easy as that.

Why is my casserole watery? Usually means too much moisture from the spinach. Next time, really wring out frozen spinach or lightly salt fresh spinach and pat dry before using.

Can I double the recipe? Of course – just use a 9×13 dish instead and add 5-10 minutes to the bake time. Perfect for feeding a crowd!

Serving Suggestions

This casserole shines all on its own, but a few simple sides take it from great to incredible! My go-to is a big handful of fresh berries for that sweet contrast. For heartier appetites, add avocado toast or crispy hash browns. And if you’re like me, a drizzle of hot sauce (I’m team Cholula) makes everything better. Honestly, it pairs with just about anything – even straight from the pan when no one’s looking!

Spinach and Feta Breakfast Casserole: 6-Ingredient Morning Bliss

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• Author: ushinzomr
• Total Time: 45 minutes
• Yield: 6 servings 1x
• Diet: Vegetarian

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Description

A hearty breakfast casserole with spinach and feta cheese.

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Ingredients

Scale 1x2x3x

• 6 large eggs
• 1 cup milk
• 2 cups fresh spinach, chopped
• 1 cup crumbled feta cheese
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 tablespoon olive oil

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Instructions

1. Preheat your oven to 375°F (190°C).
2. Grease a baking dish with olive oil.
3. In a bowl, whisk eggs and milk together.
4. Add spinach, feta, salt, and pepper. Mix well.
5. Pour the mixture into the baking dish.
6. Bake for 30-35 minutes or until set.
7. Let cool for 5 minutes before serving.

Notes

• You can substitute spinach with kale.
• Add diced tomatoes for extra flavor.
• Store leftovers in the fridge for up to 3 days.

• Prep Time: 10 minutes
• Cook Time: 35 minutes
• Category: Breakfast
• Method: Baking
• Cuisine: Mediterranean

Nutrition

• Serving Size: 1 slice
• Calories: 220
• Sugar: 2g
• Sodium: 450mg
• Fat: 15g
• Saturated Fat: 7g
• Unsaturated Fat: 6g
• Trans Fat: 0g
• Carbohydrates: 5g
• Fiber: 1g
• Protein: 14g
• Cholesterol: 220mg

Keywords: spinach feta casserole, breakfast bake, easy breakfast