Gather all your ingredients.
Preheat the oven to 350°F.
In a large bowl, mix the mashed sweet potatoes with the brown sugar.
Add the eggs, heavy cream, cinnamon, and salt.
Stir everything together until smooth and well combined.
Lightly grease your baking dish, then pour in the sweet potato mixture and spread it evenly with a spatula.
Bake for about 1 hour, or until the casserole has set and firm up.
Remove the dish from the oven, then sprinkle the marshmallows and pecans evenly on top.
Return the dish to the oven and bake for an additional 10 minutes, or until the marshmallows have puffed up and turned golden.
Remove from the oven and let it sit for about 10 minutes before serving.
Enjoy your Paula Deen sweet potato casserole! Add extra pecans for a crunchier texture, if desired.