Caramelized Onion Frittata Eggs

Caramelized Onion Frittata is one of those recipes that feels both elevated and homey all at once. It is ideal for a lazy weekend breakfast or a crowd-pleasing brunch and the rich sweetness of slow cooked onions with fluffy eggs always delivers impressive results. What I love most is how a few humble ingredients come together to make something truly special.

The first time I made this frittata it was just for myself but now even my picky eater asks for seconds whenever I serve it.

Ingredients

• Large eggs: provide the fluffy structure of the frittata ensure they are fresh for best results
• Yellow onions: when slowly caramelized bring out natural sweetness use firm onions without green shoots
• Olive oil: lets those onions soften and caramelize with a bit of richness I look for extra virgin for best flavor
• Salt: unlocks all those flavors use kosher salt if you have it
• Black pepper: adds balance and a bit of spice grind fresh if you can
• Fresh herbs like parsley or thyme: provide brightness and color choose fragrant and vibrant bunches

Step-by-Step Instructions

Caramelize the Onions:

Slice onions thin and add them to a skillet with olive oil and a sprinkle of salt over medium heat Cook gently for fifteen to twenty minutes stirring often until the onions turn golden brown and sweet patience is key here since the richer the color the tastier your frittata

Prepare the Egg Mixture:

In a large bowl whisk eggs with the remaining salt black pepper and chopped fresh herbs until the yolks and whites are thoroughly combined and light

Combine and Assemble:

Pour egg mixture over the caramelized onions in the skillet Stir gently with a spatula so onions are evenly distributed but not mixed too vigorously

Bake to Set:

Move the skillet to a preheated oven at three hundred fifty degrees Fahrenheit Bake for twenty to twenty five minutes until the eggs have puffed around the edges but still jiggle just slightly in the center when nudged

Cool and Slice:

Remove the skillet from the oven and let the frittata cool for a few minutes before slicing Serve it warm and enjoy each bite

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This frittata has become a go-to comfort dish for my family and every time I caramelize onions I remember learning from my grandmother how patience transforms basic ingredients into pure magic

Storage Tips

Leftover frittata stores well in an airtight container in the refrigerator for up to three days Reheat slices in the oven or a nonstick pan over low heat for best texture If you want to freeze it wrap tightly in plastic wrap and foil then thaw overnight before reheating

Ingredient Substitutions

You can swap in red onions for a slight twist or add a handful of spinach or roasted bell peppers between the onions and eggs Try crumbled feta or grated cheddar for a cheesy variation If you are out of fresh herbs dried work in a pinch but use about half the amount

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Serving Suggestions

Serve warm with a fresh green salad or tucked into a sandwich for a portable breakfast It also makes a satisfying dinner paired with roasted potatoes and a quick yogurt sauce You could cut the frittata into small wedges or cubes as an appetizer at a gathering

Recipe FAQs

→ How do you properly caramelize onions?

Cook sliced onions slowly over medium heat with a bit of olive oil and salt. Stir frequently until they're golden brown, about 15–20 minutes, for best flavor and texture.

→ Can I add other vegetables to the frittata?

Absolutely! Try adding sautéed mushrooms, spinach, or bell peppers before baking. Just be sure they are cooked and drained to avoid excess moisture.

→ What herbs work well in this dish?

Parsley and thyme complement the sweet onions beautifully, but chives or basil can be used for a fresh twist.

→ Is it possible to make this frittata ahead of time?

Yes, the dish can be baked in advance and kept refrigerated. Reheat gently in the oven until warmed through before serving.

→ What cheese pairs best with caramelized onions?

Sharp cheddar, goat cheese, or creamy ricotta all pair well, adding richness and tang to the finished dish.

→ Can I use red onions instead of yellow?

Red onions provide a slightly sweeter and more colorful option and can be caramelized just like yellow onions.