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Home » Savory Pies

Cast Iron Mashed Potatoes

Updated: Apr 8, 2026 by Olya Shepard · 12 Comments

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A wonderful combination of potatoes, cream cheese, and buttermilk makes this garlic and herb mashed potato pie a delicious side dish to any meal. And these buttery mashed potatoes are conveniently baked in the shape of a sliceable pie - a new spin on an old favorite.

You might also like Shepherd's Pie

Mashed potato pie in a cast iron skillet

Buttery Mashed Potato Pie with Herb and Garlic Cream Cheese is incredible! The mashed potatoes here are so creamy, the flavor is so rich! And why wouldn't they be? We're using cream cheese and butter here, after all. And not just any cream cheese, but garlic and herb cream cheese! So good!

Love Potatoes? Try Creamy Garlic Potatoes, Irish Mashed Potatoes and Instant Pot Mashed Potatoes.

Essential Equipment

I used a medium cast iron skillet here, 10 inch one, made by Lodge. It's very sturdy, holds heat perfectly and has a helper handle!

It's perfect for baking a mashed potato pie! Using a cast iron skillet does make a difference in baking: cast iron is slower to heat, but holds heat better than many other surfaces.

Buttery Mashed Potato Pie with Herb and Garlic Cream Cheese in a pan

Key Ingredients

All you need to makes this mashed potato pie potatoes, cream cheese with garlic and herbs, buttermilk, butter and some chives!  And sprinkle some of those chives on top as well!

Buttery Mashed Potato Pie with Herb and Garlic Cream Cheese

How to serve this Cream Cheese Mashed Potato Pie

I find that it's so much easier to divide and serve mashed potatoes straight from the pan and that they keep warm that way as well.

I used this pie server to cut and serve this mashed potato pie. The good thing about this tool is that it is serrated on both sides, which makes it very easy to cut any pie, not just this mashed potato pie.

The consistency of this mashed potato pie is very nice and creamy and they present beautifully.

You can make this mashed potato pie ahead and store it right in the cast iron pan in a fridge with all the flavors in tact!

And by the way, adding cream cheese makes mashed potatoes reheatable! This mashed potto pie heats up very well and always tastes great.

I love eating potatoes and can have them every day because they are so versatile!

More potato recipes

  • Instant Pot Cheesy Garlic Mashed Potatoes
  • Southern Potato Salad with Mustard, Eggs and Pickles
  • Cheddar, Thyme and Beer Potatoes Au Gratin
  • Irish Mashed Potatoes with Bacon (Colcannon)

Buttery Mashed Potato Pie with Herb and Garlic Cream Cheese

Buttery Mashed Potato Pie is a wonderful combination of potatoes, cream cheese, and buttermilk. It's a delicious side dish to any meal. And these buttery mashed potatoes are conveniently baked in the shape of a sliceable pie - a new spin on an old favorite.

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4.63 from 16 votes
Print Pin Rate
Course: Side Dish
Cuisine: American
Keyword: mashed potatoes
Prep Time: 5 minutes minutes
Cook Time: 1 hour hour
Total Time: 1 hour hour 5 minutes minutes
Servings: 10
Author: Olya Shepard

Ingredients

  • 3 lb medium red potatoes peeled
  • 7 oz (or 1.25 packages) of herb and garlic cream cheese such as Boursin
  • ¼ teaspoon freshly ground pepper
  • ¾ cup whole buttermilk
  • 4 tablespoon softened butter
  • ⅓ cup fresh chives chopped (more for garnish)
  • 1 teaspoon salt

Instructions

  • Place potatoes into a large pot and cover with salted water, bring to a boil. Reduce heat to medium-low and simmer until tender, about 20 minutes. Drain.
  • Preheat oven to 400 degrees F. Mash peeled potatoes in a large bowl with a potato masher until smooth. Lightly fold cream cheese and 3 tablespoons of butter. Add freshly ground pepper. Stir in ¾ cup of buttermilk stirring just until fluffy, but do not overmix. Add chopped chives.
  • Spoon the mashed potato mixture into a lightly greased 3-quart baking dish (we used our trusty cast iron pan). Dot top of potatoes with remaining 1 tablespoon butter and cover with aluminum foil.
  • Bake, covered, at 400 degrees F for 30 minutes. Uncover and bake 15-20 more minutes or until thoroughly heated. Sprinkle with additional chives before serving.
Calories: 215kcal
Nutrition Facts
Buttery Mashed Potato Pie with Herb and Garlic Cream Cheese
Amount per Serving
Calories
215
% Daily Value*
Fat
 
12
g
18
%
Saturated Fat
 
7
g
44
%
Cholesterol
 
36
mg
12
%
Sodium
 
380
mg
17
%
Potassium
 
674
mg
19
%
Carbohydrates
 
23
g
8
%
Fiber
 
2
g
8
%
Sugar
 
3
g
3
%
Protein
 
4
g
8
%
Vitamin A
 
505
IU
10
%
Vitamin C
 
12.5
mg
15
%
Calcium
 
56
mg
6
%
Iron
 
1.1
mg
6
%
* Percent Daily Values are based on a 2000 calorie diet.
Tried this recipe? I would love to see your creation!Let me know on Instagram @whatsinthepanblog

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Reader Interactions

Comments

  1. Chris says

    April 12, 2025 at 3:33 pm

    We made it with fresh thyme and garlic powder

    Reply
  2. Steve Schad says

    March 17, 2024 at 12:47 pm

    Lightly fold cream cheese and 3 tablespoons of butter.
    What does "fold" mean?

    Reply
    • Olya says

      March 18, 2024 at 4:04 pm

      It means to mix them with a spoon very lightly - basically just adding butter into cheese.

      Reply
  3. Alex Gomis says

    November 25, 2021 at 3:23 pm

    The only thing missing in the instructions is the freshly ground pepper, otherwise great recipe as I am making it right now and it already looks and smells delicious.

    Reply
    • Olya says

      November 25, 2021 at 4:12 pm

      Thank you Alex - I added the timing of pepper adding to the instructions.

      Reply
  4. Susy lowe says

    December 18, 2017 at 11:16 pm

    I would like to make this for a party this week but want to have it ready to put in oven when guests arrive. How early can I prep so I can just pop in oven. Can I refrigerate or maybe cook potatoes 2 hours prior and add cheese etc place in pan.

    Reply
    • Olya at Whatsinthepan says

      December 19, 2017 at 2:34 pm

      Yes this can be made a day ahead of time then popped in the oven day of. I would let the dish get to room temperature before placing in the oven however.

      Reply
  5. Mitch says

    December 09, 2017 at 4:53 pm

    Very flavorful. Great recipe

    Reply
  6. Sarah says

    October 28, 2017 at 1:34 pm

    Is it possible to use Sweet potatoes? ?

    Reply
    • Olya says

      October 29, 2017 at 12:54 pm

      If I were to use sweet potatoes, I would replace garlic cream cheese with either sweet kind of cream cheese, or use regular cream cheese and also add chopped fresh thyme.

      Reply
  7. Pierre says

    November 23, 2016 at 7:40 pm

    These look fantastic! What kind of cheese did you use?

    Reply
    • Olya says

      November 23, 2016 at 9:18 pm

      Boursin garlic and herb cream cheese.

      Reply
4.63 from 16 votes (11 ratings without comment)

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