4poundssweet potatoespeeled and cut into 1” pieces
4tablespoonsunsalted butter1/2 stick
3/4cuppacked light brown sugar
1/2cupheavy cream
1teaspoonkosher salt
1tablespoonpure vanilla extract
1teaspoonground cinnamon
1/4teaspoonground nutmeg
Topping
2cupsmini marshmallows
1/2cupall-purpose flour
4tablespoonsunsalted butter
6tablespoonspacked light brown sugar
1/4cupold fashioned rolled oatsnot instant oats
1/4teaspoonground cinnamon
Instructions
Preheat the oven to 350°F. Grease an 8”x10” casserole dish (8×8 or 9×9 works too).
Fill a large pot with sweet potato pieces and enough water to cover by 2 inches. Bring to a boil over high heat and cook until fork tender, about 10 minutes.
Drain water from potatoes and return potatoes to the pot. Using a potato masher or electric mixer, mash until mostly smooth. Add remaining ingredients (except topping ingredients and mix until combined.
Spoon sweet potatoes into the casserole dish and use the back of a wooden spoon or mixing spatula to smooth out. Sprinkle marshmallows over top of mashed sweet potatoes.
Add butter to a medium sized microwave safe bowl. Microwave on full power to melt the butter. Add remaining topping ingredients to the bowl, and use a fork to combine. Sprinkle over the top of casserole.
Place the casserole in the preheated oven and bake for 20-25 minutes, or until the streusel is crisp and marshmallows are golden brown.
Serve while warm, and enjoy!
Video
Notes
Make Ahead Instructions Prepare the mashed sweet potatoes the day before and place them in your baking dish. Cover the dish with plastic wrap and refrigerate overnight. Bring it to room temperature the day of, add the marshmallows and streusel topping, and bake per recipe instructions.