Sweet Caramelized Onion and Spinach Frittata

Delicious Spinach Frittata with Caramelized Onions: The Ultimate Easy & Healthy Family Breakfast & Brunch Recipe

Welcome to your new favorite breakfast or brunch! This delightful spinach frittata recipe is designed to be a family pleaser, even for the pickiest of eaters. Combining the savory sweetness of perfectly caramelized onions with fresh baby spinach and fluffy eggs, this frittata offers a robust flavor that makes it a hearty, healthy, and incredibly filling meal. Whether you’re planning a leisurely weekend brunch or a quick weekday breakfast, this recipe is remarkably adaptable and surprisingly easy to prepare. Follow our expert tips and step-by-step guide to create a culinary masterpiece that will impress everyone at your table.

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Before we dive into the detailed steps, let’s gather our essential ingredients. For this robust and satisfying spinach frittata, you’ll need fresh baby spinach, a large onion (caramelization is key!), green pepper, large eggs, milk (whole milk for richness is recommended), butter, and seasonings like salt and pepper. Don’t forget your favorite hard shredded cheese for that irresistible topping!

Close-up of a delicious spinach frittata slice on a white plate, ready to be enjoyed for breakfast or brunch.

A Frittata Even Picky Eaters Will Love!

The concept of a simple, warm, and delicious breakfast on a relaxed weekend morning often sounds like a dream. Imagine starting your day with a hearty meal before the inevitable rush of activities – church, family outings, or whatever else your schedule holds. For many, a frittata perfectly embodies this ideal. Its effortless elegance and satisfying nature make it a go-to choice.

However, reality sometimes throws a curveball, especially when you have a picky eater in the family. In my household, my eldest daughter has a strong aversion to eggs. We’ve explored countless preparations and methods to encourage her to enjoy them, from scrambling and frying to poaching, but her resistance has always been steadfast. She’ll happily consume eggs when they’re cleverly disguised in baked goods like cakes or cookies, a sentiment I wholeheartedly share!

This particular spinach frittata recipe, however, proved to be a game-changer. I was genuinely surprised and delighted when she eagerly devoured it, exclaiming, “Wow Mom, this is amazing! Gosh, this is tasty!” Those words were music to my ears, signifying a monumental parenting victory. Not only had she offered a genuine compliment, but she had also enthusiastically embraced a dish packed with nutritious vegetables – a rare and precious win for any parent navigating the world of selective eaters.

It’s a testament to the incredible flavor profile of this frittata that it managed to convert even the staunchest egg-hater. My daughter is generally open to trying new foods, which helps, and our “one-bite rule” has often been a successful strategy. This rule, which stipulates that a child must try at least one bite of a new food, significantly reduces mealtime pressure. More often than not, that single bite transforms into genuine enjoyment, proving that curiosity (and delicious cooking!) can conquer apprehension.

You might infer from my anecdotes that my daughter is a notoriously picky eater, but in truth, she only has a few steadfast food aversions: eggs, mushrooms, and yogurt. Interestingly, this frittata has now broken her long-standing egg blockade. And with our homemade berry frozen yogurt, she’s even started to enjoy yogurt. So, it seems her list of dislikes is rapidly shrinking to just one! This spinach frittata truly is a win-win, offering both nutrition and unexpected appeal for the whole family.

A golden brown spinach frittata in a rustic cast iron skillet, garnished with fresh herbs and placed on a grey linen napkin.

Expert Tips for a Perfect Spinach Frittata

Creating a truly outstanding spinach frittata is simpler than you might think, especially with a few insider tips. These pointers will help you elevate your frittata from good to absolutely exceptional, ensuring a flavorful and perfectly cooked result every time.

  • **Master the Caramelized Onions:** While it adds a bit more time to your prep, caramelizing the onions is non-negotiable for the best flavor. Cooking them slowly over low heat until they transform into a deep golden brown, sweet, and tender consistency provides a rich, complex base that permeates the entire frittata. Don’t rush this step; it’s truly worth the patience.
  • **Handle the “Puff”:** Frittatas, especially when fresh out of the oven, often puff up significantly due to steam. If your frittata rises too dramatically, a simple trick is to gently poke a few small holes in the surface with a knife or fork. This allows the excess steam to escape, preventing it from becoming overly airy or collapsing unevenly.
  • **Achieve a Golden Top:** For that beautiful, lightly browned top crust without overcooking the delicate eggs, a brief stint under the broiler is your best friend. After the frittata is mostly cooked through, place it under a preheated broiler for just a couple of minutes. Keep a close eye on it, as broilers can work very quickly!
  • **Choose Your Cheese Wisely:** The right cheese can significantly enhance your frittata. We personally love using a robust goat’s milk cheddar for its tangy, rich flavor and excellent melting properties. However, feel free to experiment with your favorite hard shredded cheese – sharp cheddar, Gruyere, or even a blend of Italian cheeses would be delicious.
  • **Utilize an Oven-Safe Skillet:** The beauty of a frittata lies in its one-pan simplicity. Starting on the stovetop and finishing in the oven means an oven-safe skillet is essential. A well-seasoned cast-iron skillet (like the one we recommend) is perfect for this, providing even heat distribution and a seamless transition from burner to oven.

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Essential Tools for This Recipe

Having the right kitchen tools on hand makes the frittata-making process smooth and enjoyable. Here’s what you’ll need to prepare this delightful dish:

  • **Large Bowl:** Ideal for whisking your eggs and milk mixture. A sturdy bowl, like this versatile one that fits directly into a stand mixer, makes preparation effortless.
  • **Oven-Safe Skillet:** Crucial for starting your frittata on the stovetop and finishing it in the oven. We highly recommend a cast-iron skillet, such as this durable option, known for its excellent heat retention and non-stick properties once seasoned.
  • **Spatula:** Essential for stirring your vegetables during the sautéing process and for gently lifting slices of cooked frittata.
  • **Whisk:** For thoroughly combining the eggs, milk, and seasonings, ensuring a light and even texture in your frittata.
  • **Cutting Board:** A stable surface for safely chopping your onions, spinach, and green peppers.
  • **Sharp Knife:** For precise and efficient dicing and chopping of your fresh ingredients.
  • **Liquid Measuring Cup:** For accurately measuring the milk, ensuring the perfect consistency for your egg mixture.

Step-By-Step Guide: How to Make a Spinach Frittata

Let’s walk through the process of creating this incredible spinach frittata. Each step is designed to build flavor and ensure a perfectly cooked result. Remember, patience with the onions truly pays off!

  1. **Start with Caramelized Onions:** In your large, oven-safe skillet (a 12-inch cast iron skillet is ideal), melt the butter over low to medium heat. Add your diced onions along with a generous dash of salt. Cook slowly, stirring occasionally, for 10-15 minutes until the onions are deeply golden brown, soft, and sweet. This caramelization process builds a fundamental layer of rich flavor for your frittata. If time is short, you can simply sauté them until soft and translucent.
  2. **Prepare Your Veggies & Cheese:** While the onions are gently cooking, use this time to prep your other ingredients. Roughly chop your fresh spinach, ensuring it’s in manageable pieces. If you’re using a block of cheese, grate it now. Dice your green pepper into small, uniform pieces so it cooks evenly.
  3. **Preheat Oven & Whisk Eggs:** Preheat your oven to 400°F (200°C). In a large mixing bowl, crack your eggs. Add the milk, a pinch of salt, and a grind of fresh black pepper. Whisk this mixture thoroughly until the yolks and whites are fully combined and slightly frothy. This aeration helps create a lighter frittata.
  4. **Sauté Green Peppers:** Once your onions have achieved a beautiful caramel color and are tender, add the diced green peppers to the skillet. Continue to cook for another 3-5 minutes, stirring occasionally, until the peppers have softened.
  5. **Wilt the Spinach:** Now, add the roughly chopped fresh spinach to the skillet with the cooked onions and peppers. Stir continuously until the spinach wilts down significantly. Fresh spinach cooks quickly, so this step usually only takes a minute or two.
  6. **Add Egg Mixture to Skillet:** Pour the whisked egg and milk mixture evenly over the vegetables in the skillet. Allow it to cook on the stovetop for about 3-4 minutes. As it cooks, gently stir the eggs with the spinach and pull some of the cooked egg from the edges towards the center to allow the raw egg to flow underneath, similar to making scrambled eggs but less aggressively. This helps the frittata set evenly before baking.
  7. **Top with Cheese and Bake:** Evenly sprinkle your shredded cheese over the top of the partially set frittata in the skillet. Carefully transfer the skillet to your preheated oven. Bake for 15-20 minutes, or until the frittata is fully set in the center and lightly golden around the edges. A knife inserted into the center should come out clean.
  8. **Broil for Golden Perfection (Optional):** If you desire a beautifully browned top, carefully place the frittata under a preheated broiler for 2-3 minutes. Watch it very closely, as it can brown quickly. Once desired color is achieved, remove from oven.
  9. **Rest and Serve:** Allow the frittata to rest for a few minutes after taking it out of the oven. This helps it set further and makes for cleaner slices. Serve warm and enjoy!

A perfectly cooked slice of spinach frittata on a white plate, served with an antique fork on a grey napkin.

More Delicious Breakfast & Brunch Ideas

If you’re looking for more ways to make your mornings or weekend brunches extra special, we’ve got you covered with a selection of our other beloved breakfast recipes. From sweet indulgences to savory delights, there’s something here to please every palate.

  • **French Toast Casserole With Blackberry Syrup** is an absolutely divine dish, perfect for feeding a crowd with minimal fuss on the morning of!
  • Indulge in the airy and delightful **Blueberry Dutch Baby Pancake**, a beautiful skillet pancake that’s surprisingly easy to make and always impressive.
  • Or, for a comforting twist on a classic, try our **Baked Pancake With Apple Spice**, which brings all the cozy flavors of autumn to your breakfast table.
  • Our **Bacon, Egg, and Marionberry Brunch Biscuits** offer a unique savory and sweet combination, inspired by a truly delicious restaurant experience. They’re perfect for a special brunch.
  • For a healthy and convenient make-ahead option, these **Gluten Free Apple Muffins** are wonderfully moist and packed with wholesome goodness, ready to grab and go.

Spinach Frittata Recipe With Caramelized Onions

A golden brown spinach frittata in a rustic cast iron skillet, garnished with fresh herbs and placed on a grey linen napkin.

Detailed Spinach Frittata Recipe Card

This Spinach Frittata, bursting with savory flavors from caramelized onions and fresh spinach, makes for a healthy, hearty, and incredibly satisfying breakfast or brunch that’s simple to prepare and loved by all.

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Author: Amy
Prep Time: 10 minutes
Caramelizing Onion Time: 10-15 minutes
Servings: 6

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Ingredients

  • 8 large eggs
  • 1/2 cup milk (whole milk recommended for a richer texture)
  • 3 cups fresh baby spinach (roughly chopped)
  • 1 large yellow onion (diced for caramelizing)
  • 1 green bell pepper (diced)
  • 2 tbsp unsalted butter
  • Salt and freshly ground black pepper (to taste)
  • 1/2 cup shredded hard cheese (such as white cheddar or Gruyere; feel free to add more for extra cheesiness)

Instructions

  • **Caramelize the Onions:** In a large, oven-safe skillet (a 12-inch cast iron skillet is highly recommended for even heat), melt 2 tablespoons of butter over low to medium heat. Add the diced large onion and a dash of salt. Cook slowly, stirring occasionally, for 10-15 minutes until the onions are deeply golden brown, soft, and sweet. This caramelization process builds a fundamental layer of rich flavor for your frittata. If you’re short on time, you can simply sauté them until soft and translucent, but the caramelized flavor is truly superior.
    caramelizing onions in a cast iron skillet for spinach frittatas
  • **Prepare Remaining Ingredients:** While the onions are caramelizing, prepare your other vegetables. Roughly chop the fresh baby spinach into smaller pieces. Dice the green bell pepper into uniform, bite-sized pieces. If your cheese is not pre-shredded, grate it now.
  • **Preheat Oven & Whisk Eggs:** Preheat your oven to 400°F (200°C). In a separate large bowl, crack the 8 large eggs. Add 1/2 cup of milk (whole milk will give a creamier texture) and season generously with salt and freshly ground black pepper. Whisk vigorously until the mixture is light yellow and well combined, incorporating some air for a fluffier frittata.
  • **Sauté Green Peppers:** Once the onions are beautifully caramelized, add the diced green peppers to the skillet. Continue to cook for another 3-4 minutes, stirring frequently, until the peppers soften slightly but still retain a bit of crispness.
  • **Wilt the Spinach:** Add the roughly chopped fresh spinach to the skillet with the cooked onions and peppers. Stir constantly for about 1-2 minutes until the spinach has completely wilted down and its vibrant green color intensifies. Ensure all the spinach is fully incorporated with the other vegetables.
    wilted spinach with green peppers and onions in a cast iron skillet for spinach frittata
  • **Pour Eggs and Partially Cook:** Pour the whisked egg and milk mixture evenly over the vegetable mixture in the skillet. Let it cook on the stovetop over medium-low heat for 3-4 minutes. As the edges begin to set, gently push the cooked egg from the sides towards the center with a spatula, allowing the uncooked egg to flow underneath. This helps the frittata cook more evenly and prevents the bottom from over-browning before it goes into the oven.
    cast iron skillet with eggs, spinach, green peppers and topped with cheese for a spinach frittata
  • **Add Cheese and Bake:** Once the frittata is partially set on the stovetop, evenly sprinkle the 1/2 cup of shredded cheese over the top. Carefully transfer the entire oven-safe skillet to your preheated 400°F (200°C) oven. Bake for 15-20 minutes, or until the frittata is fully set in the center and the cheese is melted and bubbly. To check for doneness, insert a thin knife into the center; it should come out clean.
  • **Optional Broiling for a Golden Top:** For an extra golden and slightly crispy top, carefully place the frittata under a preheated broiler for an additional 2-3 minutes. Keep a very close watch, as broilers can quickly burn the top. Remove from the oven once golden. Allow the frittata to rest in the skillet for 5 minutes before slicing and serving. This resting period allows the eggs to fully set and makes for easier, cleaner portions. Enjoy your delicious, homemade spinach frittata!

Nutrition

Serving: 1g | Calories: 172kcal | Carbohydrates: 4g | Protein: 10g | Fat: 12g | Saturated Fat: 5g | Cholesterol: 237mg | Sodium: 197mg | Potassium: 235mg | Sugar: 2g | Vitamin A: 1940IU | Vitamin C: 6mg | Calcium: 124mg | Iron: 1.5mg
Course: Breakfast, brunch
Cuisine: American
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Conclusion: Share Your Frittata Creations!

We hope this comprehensive guide inspires you to whip up a delicious spinach frittata with caramelized onions for your next breakfast or brunch. It’s a simple, versatile, and incredibly satisfying dish that truly pleases everyone, even those who claim to dislike eggs! The rich flavors and wholesome ingredients make it a perfect addition to any meal plan.

Now, we’d love to hear from you! What are your favorite frittata ingredients to add? Do you have any secret tips for perfect caramelization or for getting your family to try new foods? Share your thoughts, variations, and experiences in the comments below. Happy cooking!