Discover the ultimate blend of flavor and nutrition with this easy-to-make, make-ahead Spinach Bacon and Mushroom Crustless Quiche. Perfect for breakfast or brunch, this versatile dish is not only incredibly delicious but also caters to various dietary needs, being dairy-free, grain-free, Whole30 compliant, and Keto-friendly. It’s a hearty and satisfying option that doesn’t compromise on taste or health.

Why Choose a Crustless Quiche?
For many, the idea of quiche conjures up images of a rich, flaky pastry crust. And while there’s certainly a time and place for such indulgence, embracing a crustless quiche offers a myriad of benefits that appeal to both health-conscious eaters and busy home cooks. Removing the crust immediately makes this dish more accessible for those following specific dietary protocols like Whole30, Keto, or gluten-free diets. It significantly reduces carbohydrate and grain intake, making it a lighter yet equally satisfying meal.
Beyond the dietary advantages, going crustless simplifies the preparation process. No more fussing with pastry dough, chilling times, or worrying about a soggy bottom. This streamlined approach means less time in the kitchen and more time enjoying a delicious, wholesome meal. The focus shifts entirely to the luscious, savory filling, allowing the vibrant flavors of spinach, crisp bacon, and earthy mushrooms to truly shine.

The Perfect Trio: Spinach, Bacon, and Mushrooms
The magic of this crustless quiche lies in its carefully chosen ingredients, which come together to create a symphony of flavors and textures. The combination of spinach, bacon, and mushrooms isn’t just delicious; it’s a nutritional powerhouse and a classic pairing that never disappoints.
- Spinach: Fresh spinach wilts down beautifully into the egg mixture, adding a delicate earthiness, a pop of color, and a wealth of vitamins and minerals. It’s an excellent source of iron, Vitamin K, and antioxidants, contributing significantly to the dish’s overall health profile. Its mild flavor ensures it complements the other ingredients without overpowering them.
- Bacon: Who can resist the savory crunch of bacon? For this recipe, we opt for sugar-free bacon to keep it Whole30 and Keto compliant. The rendered bacon fat also adds a depth of flavor that elevates the entire quiche, while the crispy pieces provide a delightful texture contrast against the soft egg custard. Sourcing high-quality, sugar-free bacon is key for both flavor and dietary adherence. I personally love the offerings from Butcher Box for their consistent quality and sugar-free options. They often provide brands like Pederson’s Farms, which are consistently delicious and clean. If you’re new to Butcher Box, you can often get special introductory offers like free bacon and a discount on your first order by using this link.
- Mushrooms: Sliced mushrooms bring a wonderful umami richness and a tender texture to the quiche. As they sauté with the bacon, they absorb some of its savory notes, deepening their flavor. Mushrooms are also low in calories and packed with B vitamins and potassium, making them a fantastic addition to this healthy meal.

Demystifying Nutritional Yeast
What Exactly is Nutritional Yeast?
You might have seen “nutritional yeast” pop up in recipes, especially in dairy-free or plant-based cooking, and wondered what it is. Often referred to as “nooch,” nutritional yeast is a deactivated yeast, typically from the species *Saccharomyces cerevisiae*. Unlike the active yeast used in bread making, nutritional yeast does not cause fermentation. Instead, it’s celebrated for its unique savory, nutty, and distinctly cheesy flavor profile, making it a fantastic ingredient for adding depth to dishes without dairy.
Beyond its culinary appeal, nutritional yeast is a powerhouse of nutrients. It’s an excellent source of B vitamins, including B1 (thiamine), B2 (riboflavin), B3 (niacin), B6 (pyridoxine), and B12 (cobalamin). Many brands are fortified with B12, which is particularly beneficial for those on plant-based diets as it’s typically found in animal products. It also contains protein, fiber, and trace minerals. The best part? It’s Whole30 compliant, making it a perfect addition to this quiche for that elusive cheesy taste while adhering to strict dietary guidelines. You can often find it at specialty grocery stores like Trader Joe’s or order it online from brands like Bragg on Thrive Market.

Essential Ingredients and Smart Substitutions
A great quiche starts with great ingredients. Here’s a breakdown of what you’ll need and some helpful tips for substitutions:
- Eggs: The foundation of any quiche. We use 8 large eggs for a robust and satisfying base. Opt for high-quality, pasture-raised eggs if possible for superior flavor and nutrition.
- Dairy-Free Milk: To achieve a creamy texture without dairy, full-fat coconut milk or unsweetened almond milk are excellent choices. If using coconut milk, remember to shake the can vigorously or whisk it well to ensure the cream and liquid are fully combined, as separation is natural. Ensure your chosen milk is unsweetened to maintain the savory profile of the quiche. My favorite is Native Forest Organic Coconut Milk for its rich creaminess.
- Seasonings: Simple yet effective. Sea salt, black pepper, and garlic powder are all you need to enhance the natural flavors of the ingredients without overpowering them. Feel free to adjust these to your personal preference.
- Versatility in Fillings: While spinach, bacon, and mushrooms are a winning combination, this crustless quiche recipe is incredibly versatile. Feel free to experiment with other Whole30 and Keto-friendly ingredients you have on hand. Consider adding diced bell peppers, chopped onions, cooked sausage, or even leftover roasted vegetables. The beauty of quiche is its adaptability!
Make-Ahead Magic: Perfect for Meal Prep
One of the best features of this Spinach Bacon and Mushroom Crustless Quiche is its meal-prep potential. You can bake an entire quiche on a Sunday afternoon and enjoy delicious, healthy breakfasts or brunches throughout the week. It stores beautifully in the refrigerator for up to 4 days, making busy mornings infinitely easier.
To reheat, simply slice a portion and warm it in the microwave for 1-2 minutes, or in a toaster oven until heated through. The flavors develop even further overnight, making it arguably even more delicious the next day!
Serving Suggestions to Elevate Your Meal
This quiche is fantastic on its own, but a few simple additions can turn it into an even more memorable meal. This morning, I enjoyed a slice topped with Tessemae’s Everything Bagel Ranch, and it was absolutely amazing! Other delicious serving ideas include:
- A dollop of Whole30 compliant salsa or hot sauce for a spicy kick.
- A side of fresh avocado slices for healthy fats and creamy texture.
- A simple green salad with a light vinaigrette for a balanced brunch.
- Roasted sweet potatoes or parsnips for a heartier side (if not strictly Keto).
- Fresh berries or sliced fruit for a touch of sweetness to balance the savory.
Looking for more inspiration for healthy and delicious breakfast or brunch items? Be sure to check out my other popular recipes:
- Macadamia Nut N’Oatmeal
- Paleo Chocolate Chip Banana Bread Muffins
- Paleo Breakfast Fried Rice
Ready to create this wholesome and incredibly satisfying meal? Let’s get cooking!
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Spinach Bacon and Mushroom Crustless Quiche
Ingredients
- 8 eggs
- 3 cups raw spinach
- 8 strips sugar-free bacon
- 2 cups sliced mushrooms
- ½ cup full-fat coconut milk or unsweetened almond milk, if using coconut milk, make sure to shake the can and/or mix well before using because it separates!
- 1 tsp sea salt
- ½ tsp black pepper
- 1 tsp garlic powder
- 2 tbsp nutritional yeast, (optional but highly recommended for a cheesy flavor!)
Instructions
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Prepare Your Ingredients: Preheat your oven to 350°F (175°C). Lightly grease a 9-inch round pie pan with your preferred cooking oil. Next, prepare the bacon. You can either bake it in the oven for about 12 minutes until crispy, or cook it in a skillet. For the skillet method, cut the raw sugar-free bacon into one-inch pieces. Fry the bacon in a large skillet over medium heat until it’s mostly cooked through and beginning to crisp. Drain off any excess fat, leaving about a tablespoon in the pan for flavor.
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Sauté the Vegetables: With the bacon pieces still in the skillet (and a small amount of rendered fat), add the sliced mushrooms. Sauté for 3-5 minutes, stirring occasionally, until they begin to soften and release their moisture. Then, add the raw spinach to the skillet and sauté for an additional minute, just until it wilts. Remove the skillet from the heat and set the bacon and vegetable mixture aside.
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Create the Egg Custard: In a separate large bowl, crack the 8 eggs. Add the coconut milk (or almond milk), sea salt, black pepper, garlic powder, and nutritional yeast (if using). Whisk everything together thoroughly until the mixture is well combined and slightly frothy. This ensures all the seasonings are evenly distributed and the quiche will have a consistent flavor.
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Combine and Bake: Gently fold the cooked bacon, mushrooms, and spinach into the egg custard. Pour the entire mixture into your prepared 9-inch pie dish. Carefully transfer the dish to the preheated oven and bake for approximately 40 minutes, or until the eggs are completely set and the top is lightly golden. A knife inserted into the center should come out clean.
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Cool and Serve: Once baked, remove the quiche from the oven and let it cool for a few minutes before slicing. This allows it to set further and makes for cleaner cuts. Serve warm with your favorite Whole30 compliant hot sauce, ranch dressing, or other desired toppings. Enjoy your delicious and healthy crustless quiche!
Notes
Nutrition Information (per serving)
Carbohydrates: 4g |
Protein: 14g |
Fat: 22g |
Saturated Fat: 9g |
Polyunsaturated Fat: 3g |
Monounsaturated Fat: 7g |
Trans Fat: 1g |
Cholesterol: 238mg |
Sodium: 681mg |
Potassium: 424mg |
Fiber: 1g |
Sugar: 1g |
Vitamin A: 1735IU |
Vitamin C: 5mg |
Calcium: 55mg |
Iron: 3mg
All nutrition facts are an estimate and automatically calculated. While I fact check them using My Fitness Pal, please note that they may not always be 100% accurate and depend on ingredients used. For the most accurate grams per serving size, weigh your total quiche and divide by the number of servings.