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    Sweet Potato Casserole with Marshmallows and Cinnamon Streusel

    Nov 4, 2017 · 31 Comments

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    Jump to Recipe - Print Recipe

    Sweet Potato Casserole with Marshmallows and Cinnamon Streusel goes great alongside festive holiday meals or low-key weekday dinners. It’s the ultimate side dish for any meal. Everything except for easy brown sugar streusel can be made ahead.

    Sweet Potato Casserole with Marshmallows and Cinnamon Streusel

    Sweet potato casserole is a holiday staple, meant to accompany turkey, ham or chicken! Deliciously soft and moist sweet potatoes are simply amazing with brown sugar, vanilla, nutmeg and cinnamon.

    Sweet Potato Casserole slice

    Marshmallows and Sweet Potatoes

    If you are not a sweet potato person, you will be a fan after tasting them in this sweet potato casserole recipe. And marshmallows are a perfect complement to the sweet potatoes!

    That doesn’t come as a surprise at all, since Boston Market restaurant chain uses marshmallows on their signature sweet potato side dish all year long.

    Sweet Potato Casserole with Marshmallows and Cinnamon Streusel

    How to make Cinnamon Streusel Topping

    The combination of melted marshmallows in the topping and the cinnamon streusel is what really makes this dish taste the best.
    The streusel is made with flour, brown sugar, cinnamon and nutmeg.

    To make Streusel topping, combine 1 cup flour, ¼ teaspoon salt, 1 teaspoon ground cinnamon and 6 tablespoon butter.

    Get ready to crumble! Using your fingers rub the butter in the the flour, then add ¼ cups sugar until lumps form. Then stop.

    I, on the other hand, really got into it and rubbed the butter into the flour way too effeciently which made it look bread-crumby. Don’t do that unless you like fine crumbs.

    You know what else works really well to help make it right? Adding a bit of water will make it more sticky and more clumpy mix that bakes nice and crunchy.

    How to make sweet potato casserole

    Step 1 is to cook cut up sweet potato pieces until fork tender, about 15 to 20 minutes and then drain them. And then simply add butter, brown sugar, nutmeg and cinnamon.

    Mash potatoes with a potato masher (that’s what I used) or blend with an electric mixer, until mostly smooth.

    Add heavy cream and combine for another minute until incorporated.

    Transfer sweet-potato mixture to a 2-quart baking dish. (To make ahead, refrigerate, up to 1 day.). Top with LOTS of mini marshmallows.

    Sweet potatoes covered with mini marshmallows

    Finally add prepared cinnamon streusel topping.

    Cinnamon streusel topping on top of sweet potato casserole

    Bake the sweet potato casserole at 375 F until center is warmed through and marshmallows are lightly browned, 30 minutes.

    Health Benefits of Sweet Potato Casserole

    Sweet potatoes are some of the healthiest foods you can find on your holiday menu!

    Sweet potatoes are an excellent source of vitamin A, which is essential for the immune system and mucus membranes. It also acts as an antioxidant, protecting cells from free radical damage . The potatoes also provide us with vitamin C, manganese, copper, and vitamin B6.

    What to serve with the sweet potato casserole

    • Grand Marnier Cranberry Sauce
    • Easy No Bake Lemon Pudding Cream Pie
    • Slow Cooker Barbecue Beef Brisket

    More Holiday recipes

    Creamy Bacon Brussels sprouts
    Roasted Butternut Squash and Brussels sprouts
    Roasted Spatchcock Chicken with Garlic Mustard Crust

    Sweet Potato Casserole with Marshmallows
    Print Recipe
    4.79 from 32 votes

    Sweet Potato Casserole with Marshmallows and Cinnamon Streusel

    It’s the ultimate side dish for any meal. Everything except for easy brown sugar streusel can be made ahead.
    Prep Time15 mins
    Cook Time30 mins
    Total Time45 mins
    Course: Side Dish
    Cuisine: American
    Keyword: sweet potato casserole
    Servings: 6 servings
    servings
    Author: Olya

    Ingredients

    Sweet Potatoes

    • 5 pounds sweet potatoes, (peeled and cut into 1” pieces)
    • 4 tablespoons unsalted butter, (½ stick)
    • ½ cup brown sugar
    • ½ teaspoon salt
    • 1 teaspoon pure vanilla extract
    • 1.5 teaspoon ground cinnamon
    • ¼ teaspoon ground nutmeg
    • ½ cup heavy cream
    • 2 cups mini marshmallows

    Brown Sugar Streusel Topping

    • 1 cup all-purpose flour
    • ¼ teaspoon salt
    • 1 teaspoon ground cinnamon
    • 6 tablespoon unsalted butter, room temperature
    • ¼ cup dark brown sugar, (packed)

    Instructions

    Streusel Topping

    • Mix flour, salt, ground cinnamon, butter and dark brown sugar with a fork until a desired crumble texture is achieved. Add more sugar if you want finer crumbs.

    Sweet Potatoes

    • Bring large pot with water to boil over high heat. Add sweet potato pieces and cook until fork tender, about 15 to 20 minutes. 
    • Drain potatoes and place them back into pot or large bowl. Mash potatoes with a potato masher or blend with an electric mixer, until mostly smooth.
    • Add butter, brown sugar, salt, vanilla extract, nutmeg and cinnamon and using a potato masher, mash until combined.
    • Add heavy cream and combine for another minute until well incorporated.
    • Transfer sweet-potato mixture to a 2-quart baking dish. Top with 2 cups of mini marshmallows and set aside.
    • Preheat oven to 375 F.

    Final Assembly

    • Top the sweet potato mixture and marshmallows with the prepared crumble topping.
    • Bake at 375F until center is warmed through and marshmallows and topping is lightly browned, 30 minutes.
    Nutrition Facts
    Sweet Potato Casserole with Marshmallows and Cinnamon Streusel
    Amount Per Serving
    Calories 800 Calories from Fat 234
    % Daily Value*
    Fat 26g40%
    Saturated Fat 16g100%
    Cholesterol 77mg26%
    Sodium 530mg23%
    Potassium 1347mg38%
    Carbohydrates 134g45%
    Fiber 12g50%
    Sugar 52g58%
    Protein 9g18%
    Vitamin A 54505IU1090%
    Vitamin C 9.1mg11%
    Calcium 169mg17%
    Iron 3.6mg20%
    * Percent Daily Values are based on a 2000 calorie diet.

    Nutritional information is provided as a courtesy only. This information comes from online calculators. Although whatsinthepan.com attempts to provide accurate nutritional information, these figures are only estimates.

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    Reader Interactions

    Comments

    1. Tiara says

      November 26, 2020 at 4:53 am

      I’m curious as to why the streusel topping can’t be made the night before

      Reply
      • Olya says

        November 26, 2020 at 1:41 pm

        Yes, you can and keep in an airtight container in the refrigerator until ready for use.

        Reply
    2. Jess says

      November 25, 2020 at 5:14 pm

      So excited to try this recipe! Is there a way to substitute the heavy cream?

      Reply
      • Olya says

        November 26, 2020 at 1:36 pm

        You can use half and half.

        Reply
    3. Faith says

      November 24, 2020 at 8:20 am

      Would there be a way to substitute canned yams for the sweet potatoes? Do you know how much yams you would use? I am cooking everything myself this year, so looking to make it a little easier.

      Reply
      • Olya says

        November 26, 2020 at 1:41 pm

        Yes, of course!

        Reply
    4. Jen says

      November 22, 2020 at 9:32 pm

      Hands down the best sweet potato dish I have ever had. Everyone at my Thanksgiving table agreed—even the people who don’t like sweet potatoes loved this!

      Reply
      • Olya says

        November 24, 2020 at 12:05 am

        So glaaaad it was the best sweet potato dish at your table!!!

        Reply
    5. Christina says

      December 24, 2019 at 1:13 pm

      Can I make it the day before and just add the toppings the next day and pop in the oven?

      Reply
      • Olga says

        December 25, 2019 at 11:19 am

        Yes, it would be perfectly fine

        Reply
    6. Laura says

      November 27, 2019 at 3:47 pm

      Can bananas be incorporated in this dish

      Reply
      • Olga says

        November 27, 2019 at 4:25 pm

        Yes!

        Reply
    7. Julio says

      November 25, 2019 at 9:20 pm

      How many people does this serve?

      Reply
      • Olga says

        November 25, 2019 at 11:14 pm

        Six large servings.

        Reply
    8. Johnny says

      November 18, 2017 at 7:49 pm

      I thought that sweet potatoes needed more sugar. Other than that, I liked it.

      Reply
    9. Fiona says

      November 16, 2017 at 7:49 pm

      I tried it exactly as the recipe – it reminded me of Boston Market’s sweet potatoes. Very good.

      Reply
    10. Valerie says

      November 15, 2017 at 7:48 pm

      I added pecans into the topping, I chopped them pretty well and really loved it!

      Reply
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    Hi, I'm Olya! Welcome to the online home of my recipes that will make you look like a pro, yet without having to spend too much time in the kitchen! More about me →

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