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    Mashed Potato Bake

    Jump to Recipe·Print Recipe

    This dish combines two holiday favorites—mashed potatoes and green vegetables—for a fun twist on tradition! Green beans and broccoli pair perfectly with mashed potatoes. Enjoy as is or with Creamy Mushroom Gravy!

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    Mashed Potato Bake


    • Prep Time: 30 mins
    • Cook Time: 25 mins
    • Total Time: 55 mins
    • Yield: 8-10 1x
    Print Recipe
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    Ingredients

    Scale
    • Sauce:
    • ½ cup water
    • 2 ounces raw, unsalted cashews (about ½ cup)
    • ¾ teaspoon granulated onion
    • 1 tablespoon dried Italian seasoning
    • Potatoes:
    • 3½ pounds white potatoes (about 5 large russets), peeled and cut into ¾-inch chunks (about 8 cups)
    • ¾ teaspoon granulated garlic
    • Vegetables:
    • 3 cups green beans cut into small pieces (see photo below)
    • 4 cups broccoli florets

    Instructions

    1. Place all of sauce ingredients, except for the Italian seasoning, into a small blender, and set aside. Preheat the oven to 400°F, and set out a 3-quart casserole dish.
    2. Place the potatoes into a pot and cover with water. Stir in the granulated garlic. Bring to a boil on high heat, and cook until tender and soft, 8 to 10 minutes. Using a slotted spoon, transfer the cooked potatoes to a glass or metal mixing bowl, reserving the cooking water in the pot.
    3. Bring 8 cups of water to a boil in a separate pot. Once boiling, add the green beans and broccoli, and cook until both are tender, 5 to 7 minutes. Drain and set aside.
    4. Blend the sauce ingredients until very smooth, then stir in the Italian seasoning (don’t blend it). Pour this into the bowl of potatoes.
    5. Blend the potato-sauce mixture with an electric hand mixer (or handheld potato masher), adding 1 to 2 cups of the cooking water gradually until a smooth and fluffy texture is reached.
    6. Fold the cooked green beans and broccoli into the potatoes before spooning into the casserole dish; smooth the top (see photo below). Bake for 20 to 25 minutes uncovered, until edges begin to brown. Serve immediately (or leave in oven on “warm” until ready to serve). Optional: Serve with Creamy Mushroom Gravy.

    Notes

    Potatoes: I prefer russet potatoes for this dish, to keep it light and fluffy; but feel free to use other white potatoes, which may result in a firmer final texture.

    Flavor: I've kept the herbs and spices simple for this dish, but feel free to add in any that you like. And likewise, feel free to experiment with the vegetables used.

    Did you make this recipe?

    Tag @straightupfood and hashtag it #straightupfood - we can’t wait to see what you’ve made!

    Above: Cut the broccoli into small florets and the green beans into 1-inch lengths.

    Above: Russet potatoes, peeled and cut into about ¾-inch chunks, ready to be covered with water and boiled.

    Above: Add a dusting of nuts to the top upon removing from the oven (use a rotary cheese grater with any kind of nut; I have used cashews here).

    Above: The inside of this hearty casserole, yum!

    Previous Post: « Curry Rice Casserole
    Next Post: Thanksgiving Salad »

    Reader Interactions

    Comments

    1. Carol

      November 24, 2019 at 10:12 am

      I made this for dinner today, it’s delicious. I added a little nutritional yeast.

      Reply
      • Cathy

        November 24, 2019 at 7:19 pm

        Thanks for being the first comment, Carol! I'm so glad you liked it! 😉

        Reply
    2. Chelly

      November 28, 2019 at 8:28 pm

      Oh my gosh!! This casserole is soooo good! I will be making this on a regular basis. Thank you Cathy for such a great recipe!

      Reply
    3. Jamie

      December 04, 2019 at 11:15 am

      For my less-excited-about-veggies family ;)... do you think this would work well without the veggies? Thanks!

      Reply
      • Cathy

        December 04, 2019 at 5:25 pm

        Sure! 🙂

        Reply
    4. Elizabeth Knight

      December 14, 2019 at 4:23 am

      Hi, I'm trying to avoid nuts because of their fat so I'm wondering what you would think about using white beans or perhaps cauliflower in place of the cashews.

      Reply
      • Cathy

        December 14, 2019 at 9:29 am

        I would just leave them out, as their only function is to add fat/richness. White beans or cauliflower won't be adding any richness, so I don't think they need to be added. 🙂

        Reply
        • Karen

          February 02, 2021 at 1:10 pm

          Would you then not bother with the water if leaving out the nuts?

          Reply
          • Cathy

            February 02, 2021 at 6:47 pm

            Yes, you can leave the water out. 🙂

            Reply
    5. Donna

      March 06, 2020 at 2:09 pm

      I am not a fan of green beans. Would you suggest increasing the amount of broccoli or replacing with an alternate vegetable?

      Reply
      • Cathy

        March 07, 2020 at 8:35 am

        Any of the above, or just leave them out. 🙂

        Reply
    6. Janice

      May 20, 2020 at 6:12 pm

      Would frozen veggies work in this recipe? Thanks

      Reply
      • Cathy

        May 21, 2020 at 9:48 am

        Sure. 🙂

        Reply
    7. Pamela

      December 05, 2020 at 10:43 pm

      This looks delicious. I can't wait to try it!

      Reply

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