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A slice of crustless mushroom and Swiss quiche served warm on a plate, garnished with parsley.

Crustless Mushroom and Swiss Quiche


  • Author: Ava
  • Total Time: 45 minutes
  • Yield: 6 servings 1x
  • Diet: Vegetarian

Description

This Crustless Mushroom and Swiss Quiche is a savory, cheesy, and satisfying low-carb dish made without a crust. It’s perfect for breakfast, brunch, or a light dinner. Gluten-free and packed with flavor, it’s easy to make and endlessly customizable.


Ingredients

Scale
  • 6 large eggs
  • 1 ½ cups mushrooms, sliced
  • 1 small onion, finely chopped
  • 1 cup shredded Swiss cheese
  • 1 cup milk (whole, 2%, or unsweetened plant-based)
  • 1 tbsp olive oil or butter
  • ½ tsp salt
  • ¼ tsp black pepper
  • ¼ tsp dried thyme (optional)

Instructions

  1. Preheat oven to 375°F (190°C) and grease a 9-inch pie dish.
  2. In a skillet, heat oil or butter. Sauté onions until soft. Add mushrooms and cook until browned. Set aside.
  3. In a bowl, whisk eggs, milk, salt, pepper, and thyme.
  4. Spread mushroom and onion mixture in dish, top with cheese, then pour egg mixture over.
  5. Bake for 30–35 minutes or until center is set and top is golden. Cool 10 minutes before slicing.

Notes

  • Add 1 tsp Dijon mustard to the eggs for extra flavor.
  • Use Gruyère or cheddar as a cheese alternative.
  • Try add-ins like spinach, sun-dried tomatoes, or bell peppers.
  • Make ahead and reheat in the oven or microwave.
  • Prep Time: 10 minutes
  • Cook Time: 35 minutes
  • Category: Breakfast, Brunch
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 slice
  • Calories: 180
  • Sugar: 2g
  • Sodium: 320mg
  • Fat: 12g
  • Saturated Fat: 5g
  • Unsaturated Fat: 6g
  • Trans Fat: 0g
  • Carbohydrates: 4g
  • Fiber: 1g
  • Protein: 13g
  • Cholesterol: 210mg

Keywords: crustless quiche, mushroom swiss quiche, low carb breakfast, vegetarian egg dish, gluten-free quiche