Making a Quick Spinach Egg Casserole has quickly become a favorite in my kitchen. On busy mornings, when the idea of a healthy breakfast feels overwhelming, this comforting dish effortlessly combines simplicity and flavor. Bursting with nutritious spinach and creamy cheese, it’s perfect for family brunches or as a satisfying weeknight dinner. Whether you’re a novice cook or a seasoned chef, this recipe promises great results with minimal fuss.
Why You’ll Love This Dish
This Quick Spinach Egg Casserole checks all the boxes for a great meal! It’s fast, budget-friendly, and everyone in the family will adore it. With only a handful of ingredients, you can whip up a dish that’s perfect for breakfast, lunch, or dinner. Not to mention, it’s an excellent option for meal prep; you can make it ahead of time and enjoy it throughout the week.
"I made this casserole for brunch with friends, and everyone kept asking for the recipe! It’s not only easy to make, but it packed a punch of flavor." — Happy Home Chef
The Cooking Process Explained
Making this casserole is remarkably straightforward. You’ll start by whisking together eggs and milk, then stir in fresh ingredients like spinach, cheese, and onion. After coating the onions in olive oil for flavor, everything is combined and baked to perfection. The result? A fluffy, savory dish that’s sure to please!
What You’ll Need
Gather These Items:
- 6 large eggs
- 1 cup milk
- 2 cups fresh spinach, chopped
- 1 cup shredded cheese (cheddar or your choice)
- 1/2 cup diced onion
- Salt and pepper to taste
- 1 teaspoon olive oil
Feel free to customize this dish—swap out the cheese for a dairy-free option, or use frozen spinach if you’re in a pinch!

Step-by-Step Instructions
- Preheat your oven to 350°F (175°C).
- In a large mixing bowl, whisk the eggs and milk together until well combined.
- Stir in the chopped spinach, shredded cheese, diced onion, and add salt and pepper to taste.
- Heat the olive oil in a skillet over medium heat. Sauté the onions until they’re translucent.
- Pour the egg mixture into the skillet, and gently stir for about 2 minutes until everything is well combined.
- Transfer the mixture to a greased baking dish.
- Bake in the preheated oven for 25-30 minutes, or until the eggs are set and the top is golden brown.
- Allow the casserole to cool slightly before serving.
Best Ways to Enjoy It
This casserole is fantastic served warm, but you can also enjoy it at room temperature. Consider pairing it with a fresh fruit salad or buttery toast for a hearty breakfast. A dollop of salsa on top brings a delightful kick, while a glass of fresh-squeezed orange juice rounds out your meal perfectly.
How to Store
To keep your leftovers fresh, let the casserole cool completely before transferring it to an airtight container. It’ll store well in the refrigerator for up to 4 days. When you’re ready to eat, simply reheat individual portions in the microwave or pop it back in the oven until heated through.
Tips to Make It Perfect
Here are a few helpful tips to ensure your casserole turns out beautifully:
- Make sure to whisk the eggs and milk thoroughly for a lighter texture.
- Avoid overcooking the sautéed onions; they should be translucent but not browned for the best flavor.
- For added texture, consider topping your casserole with breadcrumbs or extra cheese before baking.
Recipe Variations
Want to switch things up? Try adding cooked bacon or sausage for a meaty twist! You can also experiment with herbs, such as dill or basil, for a flavor boost. If you’re feeling adventurous, consider adding chopped bell peppers or sun-dried tomatoes for a Mediterranean flair.
Your Questions Answered
What’s the prep time?
Preparation takes about 10 minutes, making this a quick meal option.
Can I use frozen spinach?
Absolutely! Just make sure to thaw and drain it well before adding it to the mixture to avoid excess moisture.
How do I reheat leftovers safely?
Reheat in the microwave or oven until the casserole is heated through, ensuring it reaches an internal temperature of 165°F to be safe for consumption.
PrintQuick Spinach Egg Casserole
A simple and flavorful casserole made with eggs, spinach, and cheese, perfect for breakfast, lunch, or dinner.
- Prep Time: 10 minutes
- Cook Time: 30 minutes
- Total Time: 40 minutes
- Yield: 4 servings
- Category: Breakfast
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
- 6 large eggs
- 1 cup milk
- 2 cups fresh spinach, chopped
- 1 cup shredded cheese (cheddar or your choice)
- 1/2 cup diced onion
- Salt and pepper to taste
- 1 teaspoon olive oil
Instructions
- Preheat your oven to 350°F (175°C).
- In a large mixing bowl, whisk the eggs and milk together until well combined.
- Stir in the chopped spinach, shredded cheese, diced onion, and add salt and pepper to taste.
- Heat the olive oil in a skillet over medium heat. Sauté the onions until they’re translucent.
- Pour the egg mixture into the skillet, and gently stir for about 2 minutes until everything is well combined.
- Transfer the mixture to a greased baking dish.
- Bake in the preheated oven for 25-30 minutes, or until the eggs are set and the top is golden brown.
- Allow the casserole to cool slightly before serving.
Notes
Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat in the microwave or oven until heated through.

