Onion Frittata

Elevate your breakfast or brunch game with this savory and satisfying Onion Frittata—a classic Italian-inspired dish that highlights the natural sweetness of caramelized yellow onions. Made with just a handful of pantry staples like eggs, grated Parmesan cheese, and whole milk, this frittata is rich, fluffy, and packed with comforting flavors. A golden finish under the broiler ensures a beautifully puffed top, while optional fresh parsley adds a pop of color and freshness. Quick to prepare in under 40 minutes, this one-pan recipe is perfect for a stress-free weekend meal or as a make-ahead dish served warm or at room temperature. Whether paired with a crisp salad or enjoyed on its own, this Onion Frittata is sure to become a go-to favorite for its easy preparation and irresistible taste!

Nutriscore Rating: 64/100

Prep Time:10 mins

Cook Time:30 mins

Total Time:40 mins

Servings: 4

Ingredients

• 3 large yellow onions
• 6 eggs
• 2 tablespoons whole milk
• 1 cup grated Parmesan cheese
• 3 tablespoons olive oil
• 1 tablespoon unsalted butter
• 1 teaspoon salt
• 0.5 teaspoon black pepper
• 2 tablespoons fresh parsley (optional, for garnish)

Directions

Step 1

Peel and slice the onions into thin half-moons.

Step 2

Heat a large, non-stick, oven-safe skillet over medium heat. Add the olive oil and butter, allowing the butter to melt completely.

Step 3

Add the sliced onions to the skillet and season with half the salt. Cook, stirring occasionally, for 15-20 minutes until the onions are caramelized and golden brown. Reduce the heat if necessary to avoid burning.

Step 4

While the onions cook, crack the eggs into a large bowl. Add the milk, grated Parmesan cheese, the remaining salt, and black pepper. Whisk until well combined.

Step 5

Preheat your oven's broiler to high and adjust the oven rack to the middle position.

Step 6

Once the onions are caramelized, spread them out evenly in the skillet. Pour the egg mixture over the onions, tilting the pan to ensure even distribution. Cook on medium-low heat for 5-7 minutes, or until the edges begin to set but the center is still slightly runny.

Step 7

Transfer the skillet to the oven and broil for 2-3 minutes, or until the top of the frittata is puffed and golden. Monitor closely to prevent overcooking.

Step 8

Remove the skillet from the oven and allow the frittata to rest for 5 minutes. Use a spatula to loosen the edges and slide it onto a cutting board or serving plate.

Step 9

Garnish with chopped fresh parsley, if desired. Slice into wedges and serve warm or at room temperature.

Nutrition Facts

Serving size	925 grams (925.0g)

Amount per serving	% Daily Value*
Calories	1434

Total Fat 108.10g	139%
Saturated Fat 39.50g	198%
Polyunsaturated Fat 4.00g
Cholesterol 1231mg	410%
Sodium 4180mg	182%
Total Carbohydrate 46.40g	17%
Dietary Fiber 8.10g	29%
Total Sugars 23.00g
Protein 76.00g	152%

Vitamin D 260IU	1298%
Calcium 1208mg	93%
Iron 7mg	36%
Potassium 1185mg	25%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 66.5%

Protein: 20.8%

Carbs: 12.7%