This Egg White Frittata comes together in about 30 minutes and is cooked all in one pot for a easy weeknight dinner that your family will love! Switch up the veggies, add in some leftover proteins, or toss in a few herbs from the garden, this dish is super versatile! You can even use it as a “clean out the fridge” meal to get rid of those odds and ends you have lingering in your produce drawer. Let’s dive in!
Ingredient Breakdown
- 1 cup of liquid egg whites or about 8 large eggs
- 1 tablespoon of olive oil
- 1/2 cup of chopped bell peppers
- 1/2 cup of chopped spinach
- 1/4 cup of finely chopped onion
- 1/4 cup of sliced mushrooms
- 1/4 cup of shredded cheese
- 1/2 teaspoon of salt and 1/4 teaspoon of black pepper
- chopped tomatoes, zucchini, or even cooked broccoli
Let’s Get Cooking!
Preheat the Oven
Start by preheating your oven to 375°F (190°C) if you plan to bake your frittata. While that warms up, grab your veggies, you’ll want to wash and chop them into small, bite-sized pieces so they’re easy to eat and cook evenly.
Sauté the Veggies
Heat up 1 tablespoon of olive oil in an oven-safe skillet over medium heat. Now it’s time to add the onion first. Give them a few minutes 3-4 ought to do it, until they’re nice and soft, and oh-so-slightly translucent.
Then toss in your mushrooms and bell peppers. Stirring occasionally, cook these beauties for another 3-4 minutes until they’re tender and the smells… wow, they’ll start to fill your kitchen with all that deliciousness. Seriously, it smells amazing!
Add the Spinach
Next up, stir in the spinach, which cooks really fast and wilts down in about a minute. You’ll see it break down, just like that, adding so much nutrition!
Pour in the Egg Whites
Okay, here comes the fun part! Pour the egg whites evenly over the cooked veggies, and use a spatula to gently move things around so the egg fills all those little spaces.
Sprinkle in your salt and pepper, and if you’re going for the cheese, layer it on top now.
Cooking Time!
Let your frittata cook on the stovetop for about 2-3 minutes until you notice the edges start to set. Now, carefully take that skillet and pop it in the oven. Bake it for 10-15 minutes, or until the center is firm and no longer wobbly.
Once done, take it out and let it cool for a few minutes. Slice it up and enjoy a slice of healthy deliciousness!

Why I Love This Egg White Frittata
Honestly, this is my go-to recipe when I’m feeling a bit low on ideas for dinner! It’s comforting, delicious, and packed with flavor. You can whip it up while listening to your favorite podcasts or just enjoying some good old tunes in the background. The best part is you can use whatever you’ve got on hand; I love how versatile it is!
Whether it’s breakfast for dinner or a quick meal prep for the week, this frittata is my absolute favorite. My kids love it too, my picky 8-year-old actually asked for seconds! Can you believe that?
If you loved this Egg White Frittata, be sure to check out my Creamy Egg Gravy, my Korean Soy Marinated Eggs, or my Gordon Ramsay Scrambled Eggs! You’ll find more ideas for quick weeknight dinners there!
Why This Recipe Works
Quick & Easy
This Egg White Frittata comes together all in one pot and takes less than 30 minutes to make! You can whip it up super fast after a long day, it’s perfect for busy evenings when you need something nourishing without a ton of fuss.
Customizable
One of the best things about this recipe is that it’s so versatile! Feel free to switch up the veggies based on what you have in your fridge or what’s in season. Toss in any leftover proteins for an extra boost, really, it’s a free-for-all!
Family-Friendly
This dish’s flavor-packed ingredients are sure to please even the pickiest eaters. Plus, it’s already cut into easy slices, making it perfect for meal prep or serving at family gatherings. Everyone loves a slice of frittata!
Budget-Friendly
Frittatas are a budget-friendly meal, relying on simple, affordable ingredients that are probably already in your pantry or fridge. Veggies are seasonal and often on sale, which keeps costs down, yay for saving money!
Meal Prep Friendly
You can make this frittata over the weekend and use it for quick breakfasts or lunches throughout the week. Just store it in the refrigerator, and you’re all set for easy meals ahead!
Serving and Storage Tips
Serving Suggestions
To make this Egg White Frittata even more delightful, serve it alongside a fresh green salad or some crispy whole-grain toast. It pairs beautifully with a dollop of salsa or avocado on the side, my favorite way to enjoy it!
Storage
This frittata keeps well in the fridge for about 4-5 days. Just let it cool completely before transferring to an airtight container.
Reheating Instructions
When you’re ready to enjoy those leftovers, you can reheat slices in the microwave for about 30-60 seconds or in a preheated oven at 350°F until warm, about 10 minutes.
Freezer Friendly?
Yes! You can freeze individual slices wrapped tightly in plastic wrap and then in foil for up to 2 months. Just thaw in the fridge overnight before reheating, so easy!
There you have it, a warm, hearty Egg White Frittata that’s quick, easy, and full of flavor! Whether it’s for breakfast, lunch, or dinner, you’re going to love how adaptable and simple this recipe is. Get ready to impress your family with this delicious dish! Follow us on Pinterest for daily meal inspiration!

Egg White Frittata
Ingredients
Method
- Preheat the oven to 375°F (190°C). Wash and chop the veggies into small pieces.
- Heat 1 tablespoon of olive oil in an oven-safe skillet over medium heat.
- Add the finely chopped onion and sauté for 3-4 minutes until soft.
- Add sliced mushrooms and chopped bell peppers; cook for another 3-4 minutes.
- Stir in the chopped spinach and cook for about 1 minute until wilted.
- Pour the liquid egg whites evenly over the cooked veggies and gently mix.
- Sprinkle in salt, pepper, and cheese (if using) on top.
- Cook on the stovetop for 2-3 minutes until the edges start to set.
- Transfer the skillet to the preheated oven and bake for 10-15 minutes until the center is firm.
- Remove from oven, let cool for a few minutes, slice, and enjoy.