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    Home » Cook

    Published: Feb 5, 2026 by Slow The Cook Down

    Chicken, Mushroom and Spinach Potato Bake

    Jump to Recipe Print Recipe
    Chicken and mushroom potato bake in a glass baking dish next to a wooden spoon.

    Creamy, hearty and perfect for the whole family, this casserole has quickly become a favorite! This chicken, mushroom and spinach potato bake is simple to make and so comforting for those chilly evenings.

    Chicken and mushroom potato bake in a glass baking dish next to a wooden spoon.

    This post may contain affiliate links. Read my privacy policy here.

    When it comes to hearty and cosy foods, you really can't beat a casserole!

    This chicken and potato bake is loaded with fresh mushrooms and spinach, topped with parmesan and mozzarella, with flavors of thyme and garlic throughout. Cooked in a creamy alfredo sauce, this easy one dish dinner is hands down delicious!

    Be sure to check out my Chicken and Orzo Pasta Bake and Beef and Vegetable Potato Bake too!

    Why you will love this recipe!

    • Cook once eat twice: This chicken potato bake recipe makes enough for at least a couple of dinners. Make it once and enjoy the leftovers for an easy dinner in the week.
    • Basic ingredients: There isn't a long list of ingredients needed for this recipe, and everything will be easily available in your local store.
    • A full meal: You can serve this casserole up with a side dish, but it is filling enough to serve by itself. With carbs, protein, fats and fresh veggies, this is a great all round dinner.
    • Family friendly: My toddler loves the creamy sauce and melted cheese, and she ate this up so quickly!
    • Dietary info: This recipe is gluten-free.
    Chicken potato bake with melted cheese served on a white plate.

    Ingredients

    • Butter and oil: For cooking. You can just use oil, but butter adds more flavor to the mushrooms.
    • Mushrooms: I used a mix of cremini and white button mushrooms. You can use any fresh mushrooms like portobello or shitake.
    • Onion: Finely diced to add flavor.
    • Spinach: Use fresh baby spinach that is more tender.
    • Potatoes: Use a floury potato like Russets or Yukon Gold for best results. Waxy potatoes, like reds, can remain firm once cooked.
    • Seasonings: Garlic cloves, dried thyme, salt and black pepper.
    • Alfredo sauce: Use your favorite store bought sauce.
    • Cream: Use 35% heavy cream. This adds a richer flavor to the sauce and also helps to cook the potatoes.
    • Shredded chicken: I used packaged shredded chicken for ease. You can also cook up your own or use rotisserie chicken.
    • Cheese: This chicken potato bake is topped with two different cheeses, shredded parmesan and fresh mozzarella.

    How to make this creamy chicken potato bake recipe

    Be sure to scroll down for the full recipe!

    • Saute the mushrooms and wilt the spinach with the garlic and seasonings.
    • In a jug or bowl, stir together the cream and alfredo sauce.
    • Peel and thinly slice the potatoes and layer in a oven safe baking dish.
    • Layer the shredded chicken and cooked vegetables on top of the potatoes.
    • Pour over the sauce and top with the cheeses.
    • Bake!
    Sauteed mushrooms and spinach in a silver skillet.
    Saute the mushrooms and cook the spinach.
    A Pyrex jug with cream sauce in it.
    Mix together the alfredo sauce and cream.
    Sliced potatoes in a glass baking dish.
    Layer sliced potatoes in a baking dish.
    Shredded chicken on top of sliced potatoes.
    Top with shredded chicken.
    Cooked mushrooms and spinach in a glass baking dish.
    Layer on the mushrooms and spinach.
    Parmesan and mozzarella cheese on top of a creamy sauce.
    Pour over the sauce and top with cheese.
    The baked casserole in a glass dish.
    Bake.

    Serving Suggestions

    This creamy and cheesy chicken potato bake is a full meal in itself, and a big bowl of this is all kinds of delicious. You can make this recipe go further by serving it up with a side of cooked veggies, a salad, or some delicious garlic bread. Try it with some of these favorites:

    • Sauteed Celery
    • Lemon Green Peas
    • Asparagus Salad
    • English Muffin Garlic Bread

    Recipe Variations

    • To reduce calories and fat, you can use half and half instead of cream.
    • Ground chicken can be used in place of shredded chicken. Brown it in a skillet before layering it on top of the potatoes. Ground turkey would also work well.
    • I love this recipe with creamy alfredo sauce, but you can use a tomato based sauce, like marinara or rose if you prefer.
    • Add in other veggies like carrots, broccoli or bell peppers. Cook the vegetables before adding them to the potatoes.
    Chicken bake in a glass dish with some served onto a white plate.

    Make Ahead, Storage and Reheating

    You can make up the whole dish and then store it, covered in the fridge for 2 to 3 days before baking it.

    Once cooked, the chicken and potato bake will keep well covered in the fridge for 4 days. Let it cool fully before covering well and storing. You can store it in the baking dish, or cut into individual portions for easy reheating.

    For best results, reheat the casserole in a preheated oven at 360F / 180c for 20 to 30 minutes til warmed through.

    Recipe Notes and Tips

    • This recipe was made in a 13 inch glass casserole dish.
    • Brown the mushrooms well for the best flavor.
    • Slice the potatoes fairly thinly to ensure that they cook well. You can use a mandoline slicer for this if easier.
    • For the best flavor, season the potatoes after each layer with a little salt and pepper.
    Chicken, mushroom and spinach potato bake in a glass dish garnished with fresh thyme.

    Chicken, Mushroom and Spinach Potato Bake

    Creamy, hearty and perfect for the whole family, this casserole has quickly become a favorite! This chicken, mushroom and spinach potato bake is simple to make and so comforting for those chilly evenings.
    Print Pin Rate
    Course: Main Course
    Cuisine: American
    Prep Time: 20 minutes minutes
    Cook Time: 1 hour hour 45 minutes minutes
    Total Time: 2 hours hours 5 minutes minutes
    Servings: 6 servings
    Calories: 621kcal
    Author: Slow The Cook Down

    Equipment

    • 13 inch casserole dish

    Ingredients

    • 1 tablespoon oil
    • 1 tablespoon butter
    • 1½ pounds fresh mushrooms sliced (680g)
    • 2 garlic cloves minced or finely diced
    • 1 onion diced
    • 1 tablespoon dried thyme
    • ½ teaspoon salt
    • ¼ teaspoon black pepper
    • 5 ounces baby spinach (140g)
    • 14 ounces alfredo sauce (410ml)
    • 1 cup cream (35%) (235ml)
    • 1½ pounds potatoes (Russets or Yukon Gold) peeled and thinly sliced (680g)
    • 9 ounces shredded chicken (250g)
    • ¼ cup shredded parmesan (4 tablespoons)
    • 1 ball fresh mozzarella sliced

    Instructions

    • Preheat the oven to 360F / 180c.
    • Add the oil and butter to a skillet and place on a medium high heat. Once hot, add in the sliced mushrooms.
      1 tablespoon oil, 1 tablespoon butter, 1½ pounds fresh mushrooms
    • Once browned, stir in the garlic, onion, thyme salt and pepper. Cook til the onion is softened.
      2 garlic cloves, 1 onion, 1 tablespoon dried thyme, ½ teaspoon salt, ¼ teaspoon black pepper
    • A handful at a time, stir in the spinach to wilt it. Once all of the spinach is cooked, take off of the heat.
      5 ounces baby spinach
    • In a jug, mix together the alfredo sauce and the cream.
      14 ounces alfredo sauce, 1 cup cream (35%)
    • Layer the sliced potatoes in the casserole dish. Sprinkle a little salt and pepper on each layer.
      1½ pounds potatoes (Russets or Yukon Gold)
    • Place the chicken on an even layer on top of the potatoes.
      9 ounces shredded chicken
    • Place the cooked mushrooms and spinach on top of the chicken.
    • Pour over the sauce so that everything is well covered.
    • Top with the parmesan and mozzarella. Cover the dish with foil.
      ¼ cup shredded parmesan, 1 ball fresh mozzarella
    • Bake in the oven for 90 minutes. Once cooked, place under the broiler until the cheese is browned.
    • Let stand for 10 minutes before serving.

    Notes

    • This recipe was made in a 13 inch glass casserole dish.
    • Brown the mushrooms well for the best flavor.
    • Slice the potatoes fairly thinly to ensure that they cook well. You can use a mandoline slicer for this if easier.
    • For the best flavor, season the potatoes after each layer with a little salt and pepper.
    • Cover the dish tightly with foil for baking.

    Nutrition

    Calories: 621kcal | Carbohydrates: 32g | Protein: 30g | Fat: 42g | Saturated Fat: 22g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 12g | Trans Fat: 0.1g | Cholesterol: 159mg | Sodium: 1037mg | Potassium: 1179mg | Fiber: 5g | Sugar: 7g | Vitamin A: 3193IU | Vitamin C: 34mg | Calcium: 318mg | Iron: 4mg
    Tried this recipe? Pin it today!Mention @SlowTheCookDown or tag #SlowTheCookDown!
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    Slow The Cook Down is all about taking life down a notch - stopping to enjoy the smell from the roast chicken you just pulled from the oven. Here, there's no reason to hurry or stress; dinner will get done, and it will be delicious! Pour a glass of wine and settle in to try something new.

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