Copycat Boston Market Sweet Potato Casserole
This Copycat Boston Market Sweet Potato Casserole is a delicious combination of sweet potatoes, molasses, vanilla, marshmallows, and topped with a brown sugar streusel. It will quickly become a family favorite!
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What You Will ❤️ About Sweet Potato Casserole
This Sweet Potato Casserole uses fresh sweet potatoes enhanced with your favorite fall flavors like cinnamon, vanilla and nutmeg. I’m a sucker for Sweet Potato Casserole anyway but the real star is the brown sugar streusel topping!
Sweet Potato Casserole Ingredients
Sweet Potato Casserole
- 4 small-medium sweet potatoes
- butter – unsalted butter is recommended but I’ve used salted as well
- egg
- spices: salt, cinnamon, vanilla extract, nutmeg
- molasses
- heavy cream
Streusel Topping
- all-purpose flour
- brown sugar
- spices: salt, cinnamon
- old fashioned rolled oats
- butter – should be room temp but not completely softened
- mini marshmallows
How to Make Boston Market Sweet Potato Casserole
This Thanksgiving casserole is pretty easy to make but because we’re using raw sweet potatoes – it takes a bit of time. You can use canned and skip the first portion of the recipe if you like (drain the syrup). I think fresh sweet potatoes have more flavor.
Sweet Potato Layer
- Preheat the oven to 350ºF.
- Wrap sweet potatoes in foil and place them on a baking sheet and bake for 1 hour. If you have a large potato – slice in half – so they all bake in the same time.
- Check to see if potato is fork-tender; if it slides in easily, they are done baking. If not, bake 10 min longer and test again.
- Let sweet potatoes cool 5-10 min until you can handle them. Remove from foil and push skins off the flesh of the potatoes.
- Place the cooked potatoes into a large bowl.
- Mash the sweet potato pieces and butter using a potato masher until mostly smooth.
- Add the eggs, salt, cinnamon, vanilla, and nutmeg. Using an electric mixer, beat until you have a uniform mixture. Add the molasses and cream and mix until combined.
- Spray and 8×8″ casserole dish with nonstick cooking spray and spread the sweet potato mixture into the pan and set aside.
Streusel Topping
- In a medium bowl, combine flour, brown sugar, salt, oats, and cinnamon until combined. Dice room temperature butter and mix until crumbly. If you have a pastry cutter – that is your best tool to use. If you don’t – just use your hands. It’s much quicker than trying to use a fork.
- Sprinkle marshmallows on top of sweet potatoes. Sprinkle the streusel mixture on top of casserole with a spoon.
- Bake at 350º for 30 minutes.
- You may be tempted to bake them a few minutes longer or broil them quickly to get the marshmallows a little more golden. RESIST THE URGE!!!!! These marshmallows will go from golden to BURNT in about 30 seconds.
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Tips, Tricks & FAQs
No. Duh.
Avoid freezing marshmallows – but if you make the base – sure you can freeze it before you bake it. Then thaw and add the topping.
Store leftovers in an airtight container and place in fridge up to a week – or freeze up to three months. Side note: the marshmallow topping won’t do so well on a freeze – so you might want to scrape that off and redo if you have a larger amount to freeze.
If reheating a full casserole or a larger amount – start with fresh marshmallows (or skip them) and reheat in 350º oven for 20-25 minutes. If reheating an individual portion, just reheat in the microwave for 1-2 minutes.
I always recommend defrosting by leaving in the refrigerator overnight.
Recipe Variations
Change up this delicious sweet potato casserole to your family’s liking! Here are a few ideas:
- Canned vs Fresh – You can swap out canned for fresh sweet potatoes and speed up the process. Just drain and skip ahead to the step where you mash the potaotes.
- Marshmallows – If you’re not a fan, you can skip the marshmallows or if you love them – double up on them! Make it the way you like it!
- Molasses – If you don’t have molasses, you can use dark brown sugar.
- Nuts – Love nuts? Feel free to add 1/4 cup pecans to the streusel mixture.
More Sweet Potato Recipes
- Copycat Sweets & Meats Sweet Potato Casserole (no marshmallows, lots of pecans)
- Air Fryer “Baked” Sweet Potatoes
- Air Fryer Sweet Potato Fries
More Holiday Side Dishes
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Boston Market Sweet Potato Casserole
Ingredients
Brown Sugar Streusel
- 1/4 cup all purpose flour
- 1/3 cup brown sugar
- 1/8 tsp salt
- 1/3 cup old fashioned rolled oats
- 1/4 tsp cinnamon
- 3 tbsp butter room temperature
- 1 cup mini marshmallows
Instructions
- Preheat the oven to 350ºF.
- Wrap sweet potatoes in foil and place them on a baking sheet and bake for 1 hour. If you have a large potato – slice in half – so they all bake in the same time. Check to see if potato is fork-tender; if it slides in easily, they are done baking. If not, bake 10 min longer and test again. Let sweet potatoes cool 5-10 min until you can handle them. Remove from foil and push skins off the flesh of the potatoes.1.5 lb sweet potatoes
- Place the cooked potatoes into a large bowl. Mash the sweet potato pieces and butter using a potato masher until mostly smooth.2 tbsp butter
- Add the egg, salt, cinnamon, vanilla, and nutmeg. Using an electric mixer, beat until you have a uniform mixture. Add the molasses and cream and mix until combined.1 egg, 1/4 tsp salt, 1/2 tsp cinnamon, 1/4 tsp vanilla extract, 1/4 tsp ground nutmeg, 3 tbsp molasses, 2 tbsp heavy cream
- Spray and 8×8" casserole dish with nonstick cooking spray and spread the sweet potato mixture into the pan and set aside.
- In a medium bowl, combine flour, brown sugar, salt, oats, and cinnamon until combined. Dice room temperature butter and mix until crumbly. If you have a pastry cutter – that is your best tool to use. If you don't – just use your hands. It's much quicker than trying to use a fork.1/4 cup all purpose flour, 1/3 cup brown sugar, 1/8 tsp salt, 1/3 cup old fashioned rolled oats, 1/4 tsp cinnamon, 3 tbsp butter
- Sprinkle marshmallows on top of sweet potatoes. Sprinkle the streusel mixture on top of casserole with a spoon.1 cup mini marshmallows
- Bake at 350º for 30 minutes.You may be tempted to bake them a few minutes longer or broil them quickly to get the marshmallows a little more golden. RESIST THE URGE!!!!! These marshmallows will go from golden to BURNT in about 30 seconds.
