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Spinach Parmesan Baked Mashed Potatoes

These simple spinach Parmesan baked mashed potatoes are the perfect way to prep before Thanksgiving. Totally delicious and packed full of flavor.

Spinach Parmesan Baked Mashed Potatoes served in a dish and scooped on a plate.

I have always loved mashed potatoes.

In fact, if I make mashed potatoes now I have a hard time not filling up my plate with mostly potatoes and little to nothing else.

I’m such a potato girl.

This version is my new favorite because I get my potato fix but I also get the addition of spinach, Parmesan, and French fried onions.

Which are basically the most delicious things on planet earth.

Plus when you baked off this delicious dish you get crispy potato edges and a creamy mashed potato center.

I seriously cannot tell you how much I love this dish. So good.

Spinach Parmesan Baked Mashed Potatoes on a small metal plate.

Ingredients to make spinach Parmesan baked mashed poatoes:

  • Potatoes – This is the base of the dish! Fresh hot made mashed potatoes. Of course you can use store bought potatoes too. It will reduce the amount of dishes you dirty.
  • Spinach – You can sue frozen chopped or fresh. Both will work in this dish.
  • Parmesan – I like to use good quality grated Parmesan cheese.
  • Fried onions – This is the topper that really sets this dish apart from most mashed potatoe dishes! It adds textrue and a big burst of flavor.

How do you make baked mashed potatoes?

For this recipe, I kept it really simple and just put in easy mixins that I knew would bake up perfectly.

  • Step 1 – make that mashed potatoes!
    • I give the full directions on how to make the mashed potatoes but you can make them however you like your mashed poatoes. You can also use storebought or boxed mashed potatos.
  • Step 2 – stir in the mixins!
    • For this recipe we are obviously using spinach and Parmesan cheese. I think this is a match made in heaven but feel free to use chopped kale in place of spinach if you have it on hand.
  • Step 3 – top it up!
    • I love the use of french fried onions in this recipe. It adds such a good crunch and the flavor is perfect!
  • Step 4 – bake!
    • Pop it in the oven and give it a good bake! It will come out hot and ready to devour!
Spinach Parmesan Baked Mashed Potatoes cooked in a red ceramic dish.

How do you store baked mashed potatoes?

If you happen to have any leftovers you can store them in an airtight container in the refrigerator for up to 3-4 days.

To reheat you can pop them in the oven or simply heat them up in the microwave.

The topping will get a little soft if you do it in the microwave but it still adds good flavor.

Can I make changes to this recipe?

Of course!

While I have already noted that you can use boxed or store-bought mashed potatoes the other simple change you can make is the ingredients you mix into the potatoes.

I love the idea of doing this recipe but instead of Parmesan and spinach, you could use bacon, cheese, and green onions to make a loaded baked potato baked mashed potatoes!

Spinach Parmesan Baked Mashed Potatoes scooped on a plate.

Love these spinach Parmesan baked mashed potatoes?

Why not try a few of my other delicious potato side dish recipes?!

These simple spinach parmesan baked mashed potatoes are the perfect way to prep before Thanksgiving. Totally delicious and packed full of flavor #HolidayHosting

Spinach Parmesan Baked Mashed Potatoes

Author: Brandy O’Neill – Nutmeg Nanny
These simple spinach parmesan baked mashed potatoes are the perfect way to prep before Thanksgiving. Totally delicious and packed full of flavor.
4.34 from 3 votes
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Servings 8 servings


  • 4 pounds red-skinned potatoes cut into 1-inch cubes
  • 1 cup whole milk
  • 8 tablespoons unsalted butter
  • 16 ounces frozen chopped spinach or 4 cups chopped fresh spinach
  • 3/4 cup grated Parmesan cheese
  • Kosher salt and pepper to taste
  • 1 cup crispy fried onions


  • Preheat oven to 375 degrees F and grease a 9×13 inch baking pan.
  • Add potatoes to a large stockpot or saucepan and cover with water.
  • Bring water to a boil and boil potatoes until they are fork-tender.
  • Drain potatoes and add back to the pot.
  • Pour in milk and butter.
  • Mash until smooth.
  • Stir in spinach, Parmesan cheese, kosher salt, and pepper.
  • Stir until well combined and the spinach is no longer frozen or in chunks.
  • Pour into prepared baking dish and cover with crispy fried onions.
  • Bake for 20 minutes until the top is golden brown and potatoes are hot.


Serving: 1g | Calories: 432kcal | Carbohydrates: 59g | Protein: 12g | Fat: 18g | Saturated Fat: 10g | Polyunsaturated Fat: 7g | Cholesterol: 42mg | Sodium: 382mg | Fiber: 7g | Sugar: 5g
Course Side Dishes
Keyword baked mashed potatoes, easy mashed potatoes, mashed potatoes, side dish recipes, spinach parmesan baked mashed potatoes, spinach parmesan potatoes, thanksgiving side dish recipes
Did you try this recipe?Leave a comment and 5 star review!

About Brandy!

I am a food lover and recipe developer bringing you delicious recipes that taste great and are easy to make! My food is inspired by travels around the world and my love of flavorful food. A list of things that make me happy: cats, Coke Zero, houseplants, and travel. Read more...

Recipe Rating


Friday 5th of December 2014

Everything about this. Yum.


Wednesday 3rd of December 2014

Wow. This looks delicious. Will be making soon!

Jen @ Baked by an Introvert

Wednesday 3rd of December 2014

I swear these have to be the best mashed potatoes ever! I love the addition of spinach. And parmesan makes everything so much better. Love this recipe!

Liz @ Floating Kitchen

Wednesday 3rd of December 2014

These look so good. And the spinach totally makes them healthy, right? Ahhh...a girl can dream!

Stefanie @ Sarcastic Cooking

Wednesday 3rd of December 2014

My mom always asks me why I mess with a good recipe for basic mashed potatoes, and I feel as a food blogger, I just can't help myself! These look to die for!!!!


as seen on promo graphic


as seen on promo graphic