Copycat Boston Market’s Sweet Potato Casserole Recipe

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Avatar Author's default profile picture Team Published: October 13, 2020 Modified: October 21, 2020
Copycat Boston Market’s Sweet Potato Casserole Recipe

This sweet potato casserole recipe goes great alongside your Thanksgiving meals. You can easily double this easy sweet potato casserole recipe if you’re cooking this for a crowd. Boston Market houses scrumptious homestyle cooked dishes and this savory sweet potato casserole is no different. Have a spoonful of mashed sweet potato base with a layer of oats and marshmallows with flavors that would explode in your tastebuds. It’s undeniably the best sweet potato casserole recipe you will ever make. 

The Classic Sweet Potato Thanksgiving Casserole

The origin of sweet potato has always been difficult to pinpoint. However, one thing’s for sure, it’s always been a present side dish during thanksgiving. They come in a variety of forms like Cheesy Quinoa Stuffed Potato as an appetizer or Sweet Potato Carrot Cake to serve for dessert. 

Speaking of dessert, we’re sure you’ll love our Spiced Sweet Potato Jumbo Cupcakes with Vanilla Frosting to top off the celebration. Amongst our sweet potato dessert recipes is a Sweet Potato Pound Cake baked in a bundt pan for a fun treat. There’s always an abundance of unique sweet potato recipes during the holidays but our easy sweet potato casserole has always been a timeless classic. 

If it’s your first time making a sweet potato casserole, let us paint you a picture: It’s a timeless dish with a single layer of sweet potato mixed with dairies like heavy cream or milk. They’re seasoned with spices, preferably cinnamon and nutmeg—a holiday classic. The rolled oats, brown sugar, and marshmallows are a must but you can also throw in some nuts like almonds, pecans, or walnuts to add a crunchy texture. A sweet, flavorful dish that just screams fall!

Making Sweet Potato Casserole Just Like Boston Market’s

Boston Market is dedicated to cook and serve savory rotisserie meals in the state but chicken or prime rib isn’t the only bestseller on the menu. Their sweet potato casserole is made up of the finest and freshest ingredients topped with marshmallows to boot! A recommended main dish for a sweet tooth. 

Our Southern sweet potato casserole is made up of mashed sweet potatoes seasoned with salt, cinnamon, and nutmeg. The flavorful base is mixed with heavy cream and butter giving it a smooth and creamy consistency. We also have our sweet potato toppings—marshmallows combined with oats, butter, flour, cinnamon, and brown sugar.

Once assembled and baked, you’ll be met with a soft, top layer oozing with melted marshmallows and crisp oats. If you want a slice of baked sweet potatoes with a crunch we have the perfect recipe for sweet potato casserole just for you— our Crispy Sweet Potato Casserole recipe is here to save your holidays!

If you’re the type of person who watches what they eat, worry not! Despite the marshmallows and oats slathered on top, you can always omit them for a healthy sweet potato casserole. Sweet potatoes are actually much healthier than regular potatoes. They’re a great source of fiber and minerals. 

For this sweet potato casserole recipe, we’re serving it as a main dish. But what makes a great sweet potato side dish is it’s rich in flavor and works well with meat. So go ahead and pair your savory sweet potato casserole with our Copycat Applebee’s House Sirloin Steak Recipe. Meanwhile, let’s head right into the kitchen and bake a delicious sweet potato casserole!

How To Make Copycat Boston Market’s Sweet Potato Casserole

Have a merry Thanksgiving with this sweet potato casserole recipe! This savory sweet potato casserole is seasoned with all kinds of spices and has different textures you’ll love in a casserole.

Prep: 10 mins
Cook: 40 mins
Total: 50 mins
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For Sweet Potatoes:

  • 3 ½ lbs sweet potatoes, peeled and cut into 1-inch pieces
  • 2 oz butter, (½ stick)
  • ¾ light brown sugar
  • ½ cup heavy cream
  • 1 tsp kosher salt
  • 1 tbsp vanilla extract
  • 1 tsp ground cinnamon
  • ¼ tsp ground nutmeg

For Streusel Topping:

  • 2 cups mini marshmallows
  • 4 tbsp unsalted butter
  • ½ cup all-purpose flour
  • 6 tbsp light brown sugar
  • ¼ cup old fashioned rolled oats
  • ¼ tsp ground cinnamon


  1. Preheat the oven to 350 degrees F.

Sweet Potatoes:

  1. In a large pot, boil the potatoes over high heat until fork-tender.

  2. Drain potatoes and place back in the pot. Mash or blend them until smooth.

  3. Add the butter, light brown sugar, heavy cream, salt, vanilla extract, cinnamon, and nutmeg into the mashed potatoes. Mix until fully combined.

  4. Grease a casserole dish and spoon sweet potatoes into the dish. Evenly smooth it out.

Streusel Topping:

  1. Sprinkle marshmallows on top.

  2. Melt the butter in a saucepan. Add the flour, brown sugar, oats, and cinnamon. Mix until well-combined.

  3. Pour the mixture on top of sweet potato and marshmallows.

  4. Bake for 20 to 25 min until streusel is crisp and marshmallows are golden brown.

  5. Serve a warm slice of this sweet potato casserole and enjoy!

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Commonly Asked Questions

Can you freeze sweet potato casserole?

Definitely! You can use this trick as a make-ahead sweet potato casserole. Cook your sweet potato casserole as directed aside from the toppings. Trust us, they don’t freeze well when combined. Either store them in airtight containers or line the baking dish with aluminum foil with overhang. Use the overhang to wrap the casserole and place in the freezer, lasting you two months at the most. This will ensure easy baking the day you plan to serve.

 How to reheat sweet potato casserole?

If you froze your sweet potato casserole without the toppings, then you can easily bake them as instructed. However, if you’re storing leftovers, you can use an oven or a microwave to reheat them. To reheat it in the oven, preheat it to 350 degrees F and bake for 15 to 20 minutes, while covered with foil. To reheat it in the microwave, reheat it for 5 to 10 minutes until warmed through, no covering necessary.

What is the difference between sweet potato souffle and casserole?

Despite being a common Thanksgiving dish, a sweet potato souffle is more tender, smoother, and stable when it comes to its shape. A sweet potato casserole omits the flour and eggs. A sweet potato souffle, on the other hand, has self-rising flour and eggs as its key ingredients.

sweet potato casserole


Truly the best sweet potato casserole ever, it’s a harmony of sweet and savory your taste buds would enjoy. A definite Boston Market copycat, this dish has the homestyle flavors you crave in every bite all the while being a quick and easy make ahead sweet potato casserole.

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