Name: Hearty Sausage Spinach Mushroom Egg Bake
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: American
Ingredients: 10 large eggs; 1 cup milk; 1 pound sausage, cooked and crumbled; 2 cups fresh spinach; 1 cup mushrooms, sliced; 1 cup bell peppers, diced; 1 small onion, diced; 1 ½ cups shredded cheddar cheese; 1 tablespoon olive oil or butter; 1 teaspoon salt; ½ teaspoon black pepper

Start your day with a burst of savory comfort with this Hearty Sausage Spinach Mushroom Egg Bake. This baked breakfast is loaded with flavor and packed with protein, making it the perfect choice for brunch, meal prep, or feeding a hungry weekend crowd. Whether you’re enjoying it hot out of the oven or slicing into it for an on-the-go breakfast, it delivers every time.

The combination of tender mushrooms, browned sausage, vibrant spinach, and melty cheese baked into fluffy eggs is simply unbeatable. This is more than just a breakfast casserole; it’s a whole meal in one satisfying slice. It reheats beautifully, which also makes it a meal prep champion for busy mornings or easy dinners.

What Kind of Sausage Should I Use?

This recipe is flexible and forgiving when it comes to the type of sausage. Mild or spicy Italian sausage, breakfast sausage, or even turkey sausage all work well here. Just make sure to brown and drain it thoroughly before mixing it into the egg base. The sausage provides a rich, meaty depth that ties all the vegetables and eggs together.

Ingredients for the Hearty Sausage Spinach Mushroom Egg Bake

Eggs – The base of the bake. They hold everything together and add protein and fluffiness.

Cooked Sausage – Adds savory flavor and hearty texture. You can use pork, turkey, or plant-based alternatives.

Fresh Spinach – For a boost of greens and a pop of color. It wilts perfectly into the bake.

Mushrooms – Their earthy, umami richness deepens the flavor profile.

Bell Peppers – Adds color and a touch of sweetness.

Onion – Sautéed until soft, it creates a flavor base that enhances the whole dish.

Cheddar Cheese – Melts beautifully and gives that irresistible cheesy layer on top and throughout.

Milk – Helps the eggs become light and creamy while baking.

Salt and Pepper – Simple seasonings to elevate all the ingredients.

Olive Oil or Butter – Used to sauté the veggies for added flavor and richness.

How To Make the Hearty Sausage Spinach Mushroom Egg Bake

Step 1: Prepare the Sausage and Vegetables

In a large skillet over medium heat, cook your sausage until it’s browned and fully cooked through. Drain off any excess grease and set the sausage aside. In the same skillet, add a drizzle of olive oil or butter and sauté the diced onions, bell peppers, mushrooms, and spinach. Cook until the veggies are tender and the spinach is wilted.

Step 2: Whisk the Egg Mixture

Crack the eggs into a large mixing bowl and whisk together with milk, salt, and pepper until smooth. This will be the creamy base that holds everything together. Stir in half of the shredded cheddar cheese.

Step 3: Combine the Ingredients

Add the cooked sausage and sautéed vegetables to the egg mixture. Gently fold everything together until evenly distributed. Pour the mixture into a greased 9×13-inch baking dish and sprinkle the remaining cheese on top.

Step 4: Bake to Perfection

Preheat your oven to 375°F (190°C). Place the baking dish in the oven and bake for 35 to 40 minutes, or until the center is set and the top is golden brown. A knife inserted in the center should come out clean.

Step 5: Cool and Serve

Let the egg bake rest for about 5 to 10 minutes before slicing. This makes it easier to cut and allows the flavors to settle. Serve warm and garnish with fresh herbs if you’d like a touch of color and freshness.

How to Serve and Store the Hearty Sausage Spinach Mushroom Egg Bake

This egg bake is incredibly versatile when it comes to serving. For brunch gatherings, slice it into generous squares and pair it with a side of fruit salad or toast. It also makes a filling weekday breakfast, reheated and served with avocado or a dollop of sour cream. For a cozy dinner, serve alongside a light green salad or roasted potatoes.

Storing is just as simple. Let the casserole cool completely before covering. Store leftovers in an airtight container in the fridge for up to 4 days. It also freezes well—wrap individual portions in foil or place in freezer-safe containers and freeze for up to 2 months. Reheat in the microwave or oven until warmed through.

Frequently Asked Questions

How do I prevent my egg bake from becoming watery?

Make sure to sauté the vegetables until they release most of their moisture. Especially the mushrooms and spinach. This prevents excess water from pooling during baking.

Can I make this egg bake ahead of time?

Yes! You can prepare the entire mixture the night before, pour it into the baking dish, cover it, and refrigerate overnight. Bake it fresh the next morning for best results.

What’s the best cheese to use?

Sharp cheddar gives a great balance of richness and tang. You can also try mozzarella, pepper jack, or a mix of cheeses for added flavor.

Is this recipe keto-friendly?

Yes, it’s naturally low in carbs and high in protein, making it a great option for keto diets. Just ensure the sausage has no added sugars.

Can I add other vegetables?

Definitely! Zucchini, tomatoes (seeded), or broccoli florets work wonderfully. Just be sure to sauté them first.

How can I make it dairy-free?

Use a plant-based milk like almond or oat, and opt for a dairy-free shredded cheese alternative. It still turns out delicious.

Want More Breakfast Bake Ideas?

If you loved this hearty sausage spinach mushroom egg bake, here are more comforting dishes to keep your mornings flavorful and fulfilling:

Bacon Egg and Hash Brown Casserole for a crispy, cheesy twist.
Overnight Crème Brûlée French Toast if you’re in the mood for something sweet and indulgent.
Healthy Sausage Veggie Skillet Meal when you’re craving a one-pan wonder with a veggie-packed punch.
Gooey Cinnamon Roll French Toast Casserole for those weekend brunches that feel like a celebration.
Blueberry Swirl Yogurt Bites for a lighter, grab-and-go breakfast treat.

📌 Save this recipe to your Pinterest breakfast board so you can find it whenever you need a crowd-pleasing, make-ahead meal.

And tell me how yours turned out! Did you use spicy sausage or add extra cheese on top? Maybe tossed in some zucchini?

I love seeing how these recipes evolve in your kitchens. Leave a comment, ask a question, or share a tip—we’re all here to inspire each other.

Looking for more breakfast and brunch inspiration? Head over to my Pinterest where I share daily recipes: Life with Nina on Pinterest

Hearty Sausage Spinach Mushroom Egg Bake

Author: Nina Johnson
Prep Time: 15 minutes
Cook Time: 40 minutes
Total Time: 55 minutes
Yield: 8 servings 1x
Category: Breakfast
Method: Baked
Cuisine: American

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Description

This Hearty Sausage Spinach Mushroom Egg Bake is a flavorful, protein-packed breakfast casserole perfect for meal prep, brunch, or an easy family breakfast. Made with savory sausage, fresh vegetables, eggs, and melty cheese, it’s satisfying and endlessly customizable.