Name: Mushroom and Spinach Breakfast Strata with Swiss Cheese Recipe
Prep time: 20 min
Cook time: 1 h 15 min
Total time: 1 h 35 min
Cuisine: American
Ingredients: 1 loaf day-old baguette or crusty bread, cut into 1 inch cubes (about 8 cups); 1 small yellow onion, chopped; 8 ounces cremini mushrooms, sliced; 2 tablespoons minced fresh thyme leaves; 3 cups fresh baby spinach, packed; 2 tablespoons salted butter, plus more for greasing; 2 cups grated Swiss cheese; 2 cups whole milk; 1 cup heavy cream; 8 large eggs; 2 teaspoons kosher salt; ½ teaspoon freshly cracked black pepper; 1 teaspoon Dijon mustard; ¼ teaspoon freshly grated nutmeg

Jump to Recipe· 4.4 from 44 reviews

If you are on the lookout for a comforting, savory breakfast that feels like a warm hug on a plate, then you absolutely must try this Mushroom and Spinach Breakfast Strata with Swiss Cheese Recipe. It’s a brilliant combination of tender mushrooms, fresh spinach, and melted Swiss cheese, all nestled in buttery toasted bread that soaks up a velvety custard. This strata strikes the perfect balance between earthy, creamy, and fluffy, making it an unforgettable way to kick off your morning or brunch gathering.

Ingredients You’ll Need

The image shows many ingredients placed on small and medium white bowls on a white marbled surface. In the center, there is a medium white plate stacked with many pieces of soft bread cut into squares, with a brown crust. Around it, starting from the top left, there is a white bowl full of sliced mushrooms with a light brown color. Close to it, a small white bowl holds two small yellow butter blocks. Next to it, a small white bowl contains finely chopped green herbs. Below, a smaller white bowl holds a yellow mustard sauce. To the left, there is a white bowl filled with shredded light yellow cheese. Underneath, a glass container has white milk. Another small white bowl holds diced white onion. To the right of the bread plate, there is a bigger white bowl filled with fresh green spinach leaves. Next to it, a medium white plate contains six brown eggs. A glass container with white milk is at the lower right corner. In the gaps between, small white and dark bowls hold salt, pepper, and spices. Everything is arranged neatly and clearly, photo taken with an iphone --ar 4:5 --v 7

Sometimes the simplest ingredients create the most delightful dishes, and this Mushroom and Spinach Breakfast Strata with Swiss Cheese Recipe is no exception. Each ingredient brings its own unique flavor and texture to the table, creating layers of taste that work beautifully together.

Day-old baguette or crusty bread: Using slightly stale bread ensures it soaks up the custard well without turning mushy.
Salted butter: Adds richness and helps soften the mushrooms and onions while cooking.
Yellow onion: Provides a sweet, aromatic base flavor that enhances the vegetables.
Cremini mushrooms: Bring earthiness and a meaty texture to the dish.
Fresh thyme: A fragrant herb that pairs perfectly with mushrooms and cheese.
Baby spinach: Adds freshness, color, and a tender bite when cooked down.
Swiss cheese: Offers a nutty, creamy flavor that melts beautifully in the strata.
Large eggs: The key to creating a silky custard that holds the dish together.
Whole milk and heavy cream: Make the custard rich and luscious.
Kosher salt and cracked black pepper: Essential seasoning to elevate all the flavors.
Dijon mustard: Adds a subtle tang that brightens the custard.
Freshly grated nutmeg: Provides a warm, aromatic touch to the custard.

How to Make Mushroom and Spinach Breakfast Strata with Swiss Cheese Recipe

A stainless steel pan on a white marbled surface holds several ingredients arranged separately. On the left side of the pan, there are small cubes of white onions and two chunks of pale yellow butter. Toward the top right side, there are many sliced brown mushrooms with light cream interiors. In the center, there is a small pile of fresh green herbs, likely thyme. The pan's metal handle extends to the left. The setup looks fresh and ready for cooking. photo taken with an iphone --ar 4:5 --v 7

Step 1: Preheat and Prepare Your Baking Dish

Start by preheating your oven to 350°F, positioning the rack in the center. Lightly grease a 9-inch baking dish with butter or cooking spray, or line it with parchment paper for easy cleanup. This ensures your strata won’t stick and will have beautiful edges.

Step 2: Toast the Bread Cubes

Spread your 1-inch bread cubes on a baking sheet and toast them in the oven for about 10 minutes until golden and slightly crisp. Toasting helps the bread maintain texture and soak up the delicious custard without turning into a soggy mess. Once toasted, set the bread aside and let it cool a bit.

Step 3: Cook the Vegetables

In a large skillet over medium heat, melt 2 tablespoons of salted butter. Toss in the chopped onion, sliced cremini mushrooms, and fresh thyme leaves. Cook until everything softens and develops a lovely aroma, about 7 minutes. Then add the fresh spinach and cook for another 5 minutes until wilted. This veggie mix gives the strata its hearty, flavorful base.

Step 4: Combine Bread, Vegetables, and Cheese

In a big bowl, gently toss together the toasted bread cubes, the cooked veggie mixture, and the grated Swiss cheese. The cheese will melt and meld everything together, creating that irresistible creamy texture you’re after.

Step 5: Prepare the Custard

In a blender, combine the 8 large eggs, 2 cups whole milk, 1 cup heavy cream, 2 teaspoons kosher salt, ½ teaspoon freshly cracked black pepper, 1 teaspoon Dijon mustard, and ¼ teaspoon grated nutmeg. Blend until the mixture is smooth and well combined, which ensures your custard is perfectly smooth and evenly seasoned.

Step 6: Assemble the Strata

Transfer the bread, veggie, and cheese mixture into your prepared baking dish. Slowly pour the custard over the top, pressing down gently to submerge all the bread cubes so they soak up that luscious egg mixture.

Step 7: Bake to Golden Perfection

Bake the strata uncovered for about 1 hour and 15 minutes, or until the eggs are set and the top is a gorgeous golden brown. If you notice it browning too quickly, simply tent it with foil and keep baking until fully cooked. Your kitchen will smell incredible by this point.

Step 8: Let It Rest Before Serving

Once out of the oven, allow the strata to cool for about 15 minutes. This resting time helps it set even more, making it easier to slice and enhances the flavors as everything settles together.

How to Serve Mushroom and Spinach Breakfast Strata with Swiss Cheese Recipe

Garnishes

Sprinkle freshly chopped herbs like parsley or chives on top to add a fresh burst of color and a hint of brightness. A dollop of sour cream or a drizzle of a light hollandaise sauce can also elevate the experience and add creaminess.

Side Dishes

This strata pairs wonderfully with a crisp green salad tossed in a tangy vinaigrette or some fresh fruit for a sweet contrast. For a more indulgent brunch, serve alongside sausages to complete the meal.

Creative Ways to Present

For a festive touch, try serving your Mushroom and Spinach Breakfast Strata with Swiss Cheese Recipe in individual ramekins instead of one big dish. This not only looks charming but also makes it easier to serve guests with varying appetite sizes.

Make Ahead and Storage

Storing Leftovers

Once cooled, cover your leftovers tightly with plastic wrap or transfer to an airtight container. Keep refrigerated for up to 3 days; the flavors continue to meld beautifully, making each bite just as delightful as the first.

Freezing

You can freeze individual portions by wrapping them well in foil and placing them in a freezer bag. Freeze for up to 1 month. This makes a fantastic grab-and-go breakfast when you’re short on time but craving something homemade.

Reheating

Reheat leftovers in a preheated oven at 350°F for 15-20 minutes, uncovered to crisp up the top again. Avoid microwaving if possible, as the texture might become rubbery or soggy instead of delightfully custardy.

FAQs

Can I use a different type of cheese?

Absolutely! While Swiss cheese melts beautifully and adds a nutty flavor, you can substitute Gruyère, mozzarella, or even sharp cheddar for a different twist.

Is this dish gluten-free?

This recipe uses bread, which contains gluten, but you can swap in a gluten-free bread to make the strata suitable for gluten-sensitive eaters.

Can I prepare the casserole the night before?

Yes! Prepare the strata up through assembly, then cover and refrigerate overnight. Bake it fresh in the morning, adding extra baking time if it’s cold from the fridge.

What’s the best bread to use?

A day-old crusty baguette, sourdough, or rustic country loaf are all fantastic choices because they hold up well when soaked in the custard without turning mushy.

Can I add other vegetables to this strata?

Definitely! Feel free to add bell peppers, zucchini, or asparagus to customize it to your taste. Just sauté them beforehand to remove excess moisture.

Final Thoughts

This Mushroom and Spinach Breakfast Strata with Swiss Cheese Recipe is a total crowd-pleaser and a joy to make. Whether you’re serving family brunch or bringing a dish to share, the comforting blend of flavors and textures will have everyone asking for seconds. So grab your ingredients and get baking — you’re in for a truly fantastic breakfast experience.