How to Make Sweet Potato Casserole

Timing is everything when it comes to gooey sweet potato casserole. Watch our guide to the just-right time to add the marshmallows.

-Sweet potato casserole with marshmallows is all about the goo and timing is everything when it comes to this flavorful fluff. Now, don't think that you can just top the sweet potatoes with marshmallows and then walk away. For the best looking and best tasting results, add the poppy confection for just the last 15 minutes of baking. If the marshmallows bake much longer than that, they'll overcook and get crunchy. If they aren't cooked long enough, you won't get the best ooey gooey on the top of the decadent sweet potatoes. And in our book, sweet potato casserole is all about the goo. Perfection.