Cheesy Spinach & Mushroom Casserole


Both homey and healthful, this cheesy dream of a casserole is loaded with nutrients from spinach, and super savory and lip-smack-y from all the sautéed mushrooms. Any 'shroom will do, so pick your fave.

Cheesy Spinach & Mushroom Casserole
Photo: Photographer / Brie Passano, Food Stylist / Annie Probst, Prop Stylist / Holly Raibikis
Active Time:
30 mins
Total Time:
1 hrs 15 mins


  • 2 tablespoons extra-virgin olive oil

  • 1 medium onion, chopped

  • 1 (8 ounce) package mushrooms, halved and sliced

  • 2 large cloves garlic, minced

  • 1 (16-ounce) package plus 1 10-ounce package frozen chopped spinach, thawed and squeezed dry

  • 1 ½ cups shredded extra-sharp Cheddar cheese, divided

  • 2 large eggs, beaten

  • 2 tablespoons milk

  • ¼ teaspoon salt

  • ¼ teaspoon ground pepper


  1. Preheat oven to 350°F. Coat an 8-inch-square baking dish with cooking spray. Heat oil in a large skillet over medium heat. Add onion and cook, stirring, until softened and starting to brown, about 4 minutes.Add mushrooms and garlic; cook, stirring, until the mushrooms have softened, about 4 minutes. Transfer to a large bowl.

  2. Add spinach, 1 cup cheese, eggs, milk, salt and pepper to the mushroom mixture. Stir until well combined. Transfer to the prepared baking dish, cover with foil and bake for 40 minutes. Remove from the oven and sprinkle with the remaining 1/2 cup cheese. Bake, uncovered, until the cheese is melted, about 5 minutes more.

Nutrition Facts (per serving)

177 Calories
12g Fat
7g Carbs
11g Protein
Nutrition Facts
Servings Per Recipe 8
Calories 177
% Daily Value *
Total Carbohydrate 7g 3%
Dietary Fiber 3g 11%
Total Sugars 2g
Protein 11g 22%
Total Fat 12g 15%
Saturated Fat 5g 25%
Cholesterol 68mg 23%
Vitamin A 11141IU 223%
Vitamin C 7mg 8%
Vitamin D 17IU 4%
Vitamin E 3mg 22%
Folate 151mcg 38%
Vitamin K 343mcg 286%
Sodium 301mg 13%
Calcium 287mg 22%
Iron 2mg 11%
Magnesium 78mg 19%
Potassium 498mg 11%
Zinc 2mg 18%

Nutrition information is calculated by a registered dietitian using an ingredient database but should be considered an estimate.

* Daily Values (DVs) are the recommended amounts of nutrients to consume each day. Percent Daily Value (%DV) found on nutrition labels tells you how much a serving of a particular food or recipe contributes to each of those total recommended amounts. Per the Food and Drug Administration (FDA), the daily value is based on a standard 2,000 calorie diet. Depending on your calorie needs or if you have a health condition, you may need more or less of particular nutrients. (For example, it’s recommended that people following a heart-healthy diet eat less sodium on a daily basis compared to those following a standard diet.)

(-) Information is not currently available for this nutrient. If you are following a special diet for medical reasons, be sure to consult with your primary care provider or a registered dietitian to better understand your personal nutrition needs.

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