Mushroom and Goat Cheese Frittata
A golden baked frittata of eggs and milk folded with sauteed mushrooms, sweet leek, and fresh thyme, topped with tangy goat cheese.
Why You'll Love This Recipe
This is a savory, sliceable frittata built for a relaxed lunch that still eats like a full meal. It comes together in one oven-safe skillet, holds beautifully at room temperature, and travels well, so it suits anyone who wants something they can make once and pull from over a few days. It is meat-free but hearty enough to satisfy, which makes it a good centerpiece for a light midday plate or a lazy weekend brunch.
The mushrooms and the leek both need longer than you think. Cooking them until they are truly browned and their liquid has fully cooked off concentrates their flavor and, just as important, keeps that moisture out of the eggs so the frittata sets tender rather than weepy. The goat cheese is dotted on top so it stays in distinct tangy pockets instead of melting away. A splash of milk in the eggs keeps the texture custardy rather than rubbery.
Protein and real richness turn up together. Eggs and goat cheese give it staying power, the browned mushrooms and leek bring a deep savory backbone, and the olive oil carries the thyme through every bite. Five cups of mushrooms cook down to a fraction of that, which is why the flavor is so concentrated, and it is also what lets a frittata built on nine eggs still taste of vegetables rather than only of egg.
Ingredients
- 9 large eggs
- 1 1/8 cups crumbled goat cheese
- 5 cups sliced mushrooms
- 1 large leek, sliced
- 1/2 cup milk
- 3 tbsp olive oil
- 1 1/2 tsp fresh thyme
- 1/2 tsp salt
Instructions
- Rinse the leek between its layers: Heat the oven to 375°F (190°C). Trim the root and dark green top from the leek, halve it lengthwise, and rinse between the layers before slicing, since grit hides in there and does not wash off a whole leek. Wipe the mushrooms clean rather than washing them, because they drink up water and it all has to be cooked off later. Strip the thyme leaves.
- Cook the mushrooms until their liquid is gone: Warm the olive oil in an oven-safe skillet over medium-high, add the leek and mushrooms, and cook about 8 minutes, stirring occasionally, until the mushrooms are browned and the liquid they released has evaporated. That last part is the whole step, because any water left in the pan ends up in the eggs and a frittata with wet mushrooms in it weeps. Stir in the thyme, cook a minute more, and spread the mixture level.
- Whisk the eggs until slightly frothy: Whisk the eggs with the milk and salt until the yolks and whites are fully blended and slightly frothy, about 30 seconds. Streaks of unmixed white set into rubbery ribbons, and the milk is there to soften the set so the finished frittata is tender rather than springy.
- Pour over and dot the cheese on top: Pour the eggs evenly over the vegetables and tilt the pan gently so they settle around the mushrooms and leek, then dot the top all over with crumbled goat cheese. The cheese goes on top rather than being stirred in so it stays in distinct creamy pockets instead of disappearing into the custard.
- Bake 15 to 18 minutes, then rest: Bake for 15 to 18 minutes, until the frittata is puffed, set in the center with no liquid jiggle, and lightly golden. Let it cool about 5 minutes before slicing, since eggs keep setting as they cool and a wedge cut immediately falls apart on the way to the plate.
Variations
- Spinach and mushroom: Add a few large handfuls of fresh spinach to the skillet after the mushrooms brown and cook just until wilted and the moisture evaporates before adding the eggs.
- Sun-dried tomato: Stir chopped oil-packed sun-dried tomatoes in with the thyme for a sweet-tart, chewy accent against the earthy mushrooms.
- Sharper cheese finish: Swap some of the goat cheese for crumbled feta, or add a fine grating of Parmesan over the top before baking for a saltier, nuttier edge; this keeps the dish rich in dairy.
- Herb and garlic: Cook a little minced garlic with the leek and fold in chopped fresh dill or parsley along with the thyme for a brighter, more aromatic profile.
- Roasted red pepper: Fold in chopped jarred roasted red peppers with the thyme for a smoky sweetness and a pop of color in each wedge.
Storage & Leftovers
Refrigerate leftover frittata in an airtight container for up to four days. Let wedges cool completely before covering so condensation does not make the surface soggy.
To reheat, warm a wedge in a 325°F (163°C) oven or toaster oven for about 8 to 10 minutes until heated through; this keeps the texture set and the top from turning rubbery. A short, gentle turn in the microwave also works if you are in a hurry, though the eggs firm up more. It is also good cold or at room temperature.
To make ahead, bake the whole frittata, cool it fully, and refrigerate; it slices more cleanly once chilled and firm. You can also saute the mushrooms and leek a day early and store them covered, so assembly and baking take only minutes when you are ready.
Notes & Tips
- Wash the leek well: Leeks trap sand deep between their layers, so slice first and swish the pieces in a bowl of water, letting the grit sink before lifting them out; unrinsed leek will leave a gritty crunch in the finished eggs.
- Do not rush the mushrooms: Wait until the mushrooms are browned and the pan looks dry before adding the eggs; any standing liquid will thin the custard and make the frittata watery.
- Choose a good goat cheese: A fresh, soft log crumbles into creamy pockets and melts gently; a drier aged goat cheese stays firmer and tangier, so pick based on whether you want soft or sharp bites.
- Use a truly oven-safe skillet: A cast-iron or stainless pan goes straight from stovetop to oven; if your only skillet has a plastic handle, transfer the sauteed vegetables and eggs to a greased baking dish before baking.
- Season with the cheese in mind: Goat cheese carries plenty of salt on its own, so taste the sauteed vegetables before adding the eggs and adjust gently rather than over-salting the raw egg mixture.
- Serve it alongside something crisp: A lightly dressed green salad or a piece of crusty bread rounds the wedge into a full lunch and balances the richness of the eggs and cheese.
Nutrition & Mindful Eating
- Eggs, mushrooms and goat cheese pull in three different directions on purpose. The eggs are mild and custardy, the mushrooms are dark and earthy, and the cheese arrives sharp and tangy in the gaps between them.
- Eggs loosened with milk set into something soft and sliceable, holding everything else in place, and they carry complete protein along with choline, which is part of why a single wedge eats more substantially than it looks.
- Mushrooms have to be cooked past the point where they give up their water, and once they are they go deeply savory and a little chewy. They bring B vitamins and selenium with them, and vitamin D if they were grown under light.
- Leeks cooked slowly in olive oil turn silky and faintly sweet, laying a soft base under the eggs, and the fibers they carry are the kind the bacteria in your gut feed on.
- Goat cheese and thyme are what lift this past eggs and mushrooms. The cheese stays creamy and tangy where it lands, the thyme runs woody and herbal underneath, and both come through strongest while the frittata is still warm.
- As you eat, look for the pockets where the goat cheese has stayed soft and catch the thyme coming up behind them, and give the wedge a few unhurried minutes rather than eating it over the sink.
Frequently Asked Questions
Can I make this frittata dairy-free?
You can leave out the goat cheese and skip the milk, using a splash of unsweetened plant-based milk in its place. The eggs still set well; you lose some creaminess and tang, so consider adding extra thyme or a squeeze of lemon for brightness.
Why is my frittata watery in the middle?
The most common cause is leftover moisture from the mushrooms and leek. Cook them until browned and the pan looks dry before adding the eggs. Baking until the center no longer jiggles also ensures it sets fully.
Can I use a different type of mushroom?
Yes. Cremini or baby bella add more depth than white button mushrooms, and a mix including shiitake or oyster mushrooms works well too. Slice them evenly so they brown at the same rate.
Is this good served cold, or should it be reheated?
Both work. This frittata holds its texture beautifully at room temperature or straight from the fridge, which makes it great for packed lunches. If you prefer it warm, a gentle turn in a low oven keeps the eggs tender without turning them rubbery.