Spinach, Mushroom and, Smoked Salmon Cheese Frittata

Frittatas are the perfect egg dish; they are inexpensive to make, super versatile, and easy for even the most novice of cooks. Make the perfect frittata every time with my Spinach, Mushroom, and Smoked Salmon Cheese Frittata recipe.

Nothing says brunch like a frittata. The Spinach, Mushroom, and Smoked Salmon Cheese Frittata satiates my appetite for a cheesy, egg dish on a Sunday afternoon. Want more brunch staples? Check out my Breakfast Wreath and Pomegranate Prosecco Mimosa.

Spinach, Mushroom and Smoked Salmon Cheese Frittata in a skillet with one slice cut

What’s the difference between a frittata and a quiche or omelet?

Frittatas, quiche, and omelets are brunch faves but all have different flavors, textures, and preparation methods.

In the Spinach, Mushroom and Smoked Salmon Cheese Frittata, eggs are the star of the show. Baked in a crust, quiches have more structure than frittatas. Frittatas are also more fluffy in texture than quiches because they typically have less milk and more egg.

Frittatas are cooked slower than omelets. Omelets are usually cooked quickly over high heat on the stove. Frittatas start on the stove then are transferred to the oven. Omelets are usually served hot while frittatas can be eaten at room temperature.

What do you put in a frittata?

The great thing about frittatas is that you can make them with whatever you have on hand. All you need to make a frittata are several eggs, milk, and a few odds and ends from your fridge. Seriously! There’s no need to let good food go to waste when you can throw it in a frittata!

All of the ingredients used in the Spinach, Mushroom and Smoked Salmon Cheese Frittata in separate bowls

When deciding what to add to your frittata consider veggies, cheese, and protein. Need suggestions?

Vegetables: brocolli, tomatoes, onions, peppers, mushroom, spinach and artichoke and arugula

Cheeses: goat cheese, feta, cheddar or mozzarella

Proteins: ham, sausage, bacon, salmon

Tips for Making the Best Frittata

The Spinach, Mushroom and Smoked Salmon Cheese Frittata recipe is simple but eggs can be tricky to cook. You don’t want to overcook or have the wrong ratio and end up with a quiche or omelet when you meant to make a frittata. I’ve perfected my own recipe through trial and error. I’m sure once you give it a go, you’ll have some awesome tips of your own.

Here are some tips to help from start to finish:

Use full-fat milk. While we love being health-conscious, no nonfat or two percent milk for this recipe. Otherwise, it won’t be as creamy or fluffy and that’s the best part of a frittata.

Pre-cook veggies. Before adding vegetables to your egg mixture season and cook them. This prevents a watery frittata. If you add raw vegetables, they may steam in the oven, releasing water into your mixture.

Avoid over-cooking. Keep an eye on your frittata when it’s in the oven and consider putting it in the middle rack of the oven. If you notice the top of your frittata has browned, it’s probably too late. You want to take your frittata out of the oven when it’s still a little jiggly in the middle. It will continue cooking when you take it out of the oven.

How should I store leftover Spinach, Mushroom, and Smoked Salmon Cheese Frittata?

Frittatas can keep in the fridge for up to three days. Ready to enjoy them? Opt to warm them up in a skillet rather than the microwave. Add them to a sandwich or even a breakfast taco.

The Spinach, Mushroom and Smoked Salmon Cheese Frittata before the salmon is added

Spinach, Mushroom and Smoked Salmon Cheese Frittata

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Course: EntreeCuisine: BrunchDifficulty: Easy


Prep time


Cooking time






  • 1 cup 1 Spinach

  • ¼ cup ¼ Extra-virgin olive oil

  • 6 6 White mushrooms, thinly sliced

  • ¾ teaspoon ¾ Kosher salt, plus extra for sprinkling

  • ¼ cup ¼ Shallots

  • 8 8 Eggs

  • 1 teaspoon 1 Dijon mustard

  • 1/4 cup 1/4 Half and half

  • 1 teaspoon 1 Black Pepper, freshly grounded

  • 1/2 cup 1/2 Gruyère

  • 1/2 cup 1/2 White cheddar cheese

  • Smoked Salmon


  • Preheat the oven to 350°F.
  • Slice stems from the spinach. Chop the leaves coarsely. 
  • Heat 3 tablespoons of the oil in a cast iron or ovenproof skillet over medium-high heat. 
  • Add the mushrooms, sprinkle lightly with salt, and sauté, stirring frequently, until golden brown, 5 to 7 minutes. Lower the heat to medium, add the shallots, and cook until the shallots are softened but not browned, about 30 seconds.
  • Add the spinach, a few handfuls at a time and cook, tossing with tongs, until soft and wilted, about 3-4 minutes. 
  • Add ¼ teaspoon of the salt and continue cooking and tossing until all the liquid in the pan evaporates, about 3 more minutes. Turn off the heat.
  • Whisk the eggs, half-and-half, mustard,  salt, and pepper together in a medium bowl. Stir in the cheese.
  • Add olive oil to the skillet and heat over medium heat. Spread out the vegetables evenly and, when the pan is hot, pour in the egg mixture.
  • Cook for about 2 minutes, and then transfer the skillet to the oven. 
  • Bake until the eggs are set on top, about 10-12 minutes.
  • Place the frittata under the broiler a few inches from the heat source until the top is golden, 2 to 3 minutes and remove from the heat and let rest for 3-4 minutes. The frittata will pull away from the sides of the pan.
  • Place a few pieces of smoked salmon on top.
  • Either slice in the pan or flip the frittata onto a plate and sprinkle with dill. Serve immediately.

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