Crustless Mushroom Quiche is a delightful dish that can be enjoyed for breakfast, lunch, or dinner. This quiche is not only packed with flavor but is also incredibly easy to make. With a combination of savory ground beef, earthy mushrooms, and creamy cheeses, this recipe is perfect for satisfying your cravings while being low on carbs. Plus, it’s a fantastic way to sneak in some veggies! Let’s dive into this delicious recipe that will surely become a new favorite in your household.
Top Reasons to Make Crustless Mushroom Quiche

- Quick and Easy: This recipe comes together in no time, making it perfect for busy weeknights or leisurely brunches.
- Flavorful and Filling: The combination of beef, mushrooms, and cheese creates a rich and satisfying dish.
- Versatile: You can customize this quiche with your favorite ingredients, making it a great option for any meal.
- Low-Carb Friendly: Without a crust, this quiche is a great low-carb alternative to traditional quiches.
- Great for Meal Prep: This dish keeps well in the fridge, making it ideal for meal prep or leftovers.
The Ingredient Lineup
To make this Crustless Mushroom Quiche, you will need the following ingredients:
- 1 lb ground beef: Provides a hearty base and protein.
- 8 oz white mushrooms, sliced: Adds an earthy flavor and great texture.
- 2 green onions, thinly sliced (greens only): Offers a fresh, mild onion flavor.
- 1 cup Swiss cheese, shredded: Brings a creamy, nutty taste.
- 1 handful of spinach, chopped: Adds color and nutrients.
- 10 eggs: The binding agent that holds everything together.
- 1 ½ cups heavy cream: Contributes to a rich and custardy texture.
- 1 cup whole milk: Adds creaminess and balances the heavy cream.
- ½ tsp sea salt: Enhances the flavors of the dish.
- Cracked pepper: For a touch of heat.
- 1 tsp crushed red pepper (optional): Adds a spicy kick, if desired.
Prep & Cook Tools
To prepare this Crustless Mushroom Quiche, you will need the following tools:
- Large skillet: For sautéing the ground beef and mushrooms.
- Mixing bowl: To combine the egg mixture.
- Whisk: For beating the eggs and mixing in the cream and milk.
- Baking dish or pie pan: To bake the quiche.
- Measuring cups and spoons: For accurate ingredient measurements.
- Spatula: To mix ingredients and serve the quiche.
Mastering Crustless Mushroom Quiche: How-To

Step 1: Preheat the Oven
Preheat your oven to 375°F (190°C). This ensures that your quiche bakes evenly and comes out perfectly cooked.
Step 2: Prepare the Beef and Mushrooms
In a large skillet over medium heat, add the ground beef. Cook until browned, breaking it up with a spatula as it cooks. Drain any excess fat. Add the sliced mushrooms to the skillet and cook until they are softened, about 5 minutes. Season with sea salt and cracked pepper to taste. Remove from heat and let cool slightly.
Step 3: Whisk the Egg Mixture
In a large mixing bowl, whisk together the eggs, heavy cream, whole milk, and a pinch of salt and pepper. Make sure everything is well combined and frothy.
Step 4: Combine Ingredients
To the egg mixture, add the cooked beef and mushrooms, green onions, Swiss cheese, and chopped spinach. Gently fold everything together until combined.
Step 5: Pour into Baking Dish
Grease a baking dish or pie pan with a little oil or cooking spray. Pour the quiche mixture into the prepared dish, spreading it out evenly.
Step 6: Bake the Quiche
Place the dish in the oven and bake for 35-40 minutes, or until the quiche is set and the top is lightly golden. A knife inserted into the center should come out clean.
Step 7: Cool and Serve
Once baked, remove the quiche from the oven and let it cool for about 10 minutes before slicing. This allows the quiche to set further and makes it easier to cut.
Seasonal Twists

You can easily adapt this Crustless Mushroom Quiche to suit the seasons or your taste preferences. Here are some ideas:
- Spring: Add asparagus or fresh herbs like dill or chives.
- Summer: Incorporate zucchini or bell peppers for a fresh twist.
- Fall: Use sautéed kale and a sprinkle of nutmeg for a cozy flavor.
- Winter: Add roasted butternut squash or hearty root vegetables.
Mistakes That Ruin Crustless Mushroom Quiche
Creating the perfect Crustless Mushroom Quiche can be a simple task, but a few common mistakes can lead to disappointment:
- Overcooking: Keep an eye on your quiche while baking. Overcooked quiche can become rubbery and dry.
- Skipping the Sauté: Failing to sauté the ground beef and mushrooms can lead to excess moisture in the quiche.
- Not Greasing the Dish: Always grease your baking dish to prevent sticking and ensure easy removal.
- Using Cold Ingredients: Make sure your eggs and dairy are at room temperature for a smoother mixture.
Leftovers & Meal Prep
Crustless Mushroom Quiche is perfect for meal prep and leftovers. Here are some tips:
- Storing: Keep leftovers in an airtight container in the fridge for up to 4 days.
- Freezing: You can freeze individual portions wrapped in plastic wrap and then stored in a freezer bag for up to 3 months.
- Reheating: Reheat in the microwave or oven until warmed through. If frozen, let it thaw in the fridge overnight before reheating.
Questions People Ask
Can I make this quiche ahead of time?
Absolutely! You can prepare the quiche a day in advance and store it in the refrigerator. Just reheat it before serving.
What can I substitute for ground beef?
You can use ground turkey, chicken, or even plant-based meat alternatives for a lighter or vegetarian option.
Can I add other vegetables?
Yes! Feel free to add any vegetables you like, such as bell peppers, zucchini, or even broccoli.
How do I know when the quiche is done baking?
The quiche is done when it’s set in the center and lightly golden on top. A knife inserted in the middle should come out clean.
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The Last Word
Crustless Mushroom Quiche is a versatile, delicious, and easy-to-make dish that is perfect for any occasion. Whether you’re hosting a brunch, looking for a quick weeknight dinner, or meal prepping for the week ahead, this quiche is sure to please. With its rich flavors and creamy texture, it’s a dish that will become a staple in your kitchen. So gather your ingredients, follow the steps, and enjoy this delightful quiche with your family and friends. You’ll be glad you did!

Crustless Mushroom Quiche
Ingredients
- 1 lb ground beef provides a hearty base and protein
- 8 oz white mushrooms sliced, adds earthy flavor
- 2 green onions thinly sliced (greens only)
- 1 cup Swiss cheese shredded, brings creamy taste
- 1 handful spinach chopped, adds color and nutrients
- 10 eggs the binding agent
- 1.5 cups heavy cream contributes to rich texture
- 1 cup whole milk adds creaminess
- 0.5 tsp sea salt enhances flavors
- cracked pepper for a touch of heat
- 1 tsp crushed red pepper optional, adds spicy kick
Instructions
- Preheat your oven to 375°F (190°C).
- In a large skillet over medium heat, cook the ground beef until browned. Drain excess fat, then add sliced mushrooms and cook until softened, about 5 minutes. Season with salt and cracked pepper, then remove from heat.
- In a large mixing bowl, whisk together the eggs, heavy cream, whole milk, and a pinch of salt and pepper until well combined.
- Add the cooked beef and mushrooms, green onions, Swiss cheese, and chopped spinach to the egg mixture. Gently fold until combined.
- Grease a baking dish or pie pan and pour in the quiche mixture, spreading it evenly.
- Bake for 35-40 minutes, or until set and lightly golden. A knife inserted into the center should come out clean.
- Let the quiche cool for about 10 minutes before slicing.
Equipment
- Large Skillet
- Mixing Bowl
- Whisk
- Baking dish or pie pan
- Measuring cups and spoons
- Spatula
Notes
- Store leftovers in an airtight container in the fridge for up to 4 days.
- Freeze individual portions wrapped in plastic wrap for up to 3 months.
- Reheat in the microwave or oven until warmed through.
