Marshmallow-topped sweet potato casserole has a place of honor on the Thanksgiving table (at least since the mid-twentieth century), but that doesn’t mean it has to be overcooked, overdosed with spices, and overly sweet. This simple version, topped with a traditional layer of browned marshmallows, is lightly sweetened, with sweet potatoes that end up tender, not mushy. And instead of the usual cloud of pumpkin pie spices, it’s flavored simply with just a hint of ginger (we prefer the spiciness of candied or crystallized ginger, but ground ginger works just fine). If your marshmallows happen to catch fire under the broiler, here’s a quick video tip on how to save the casserole (and the day).
Make-ahead note: Prepare through step 4 up to 1 day ahead (skip the heating of the oven). Cool the casserole completely, cover it with foil, and refrigerate. When ready to serve, reheat covered in a 350°F oven until warmed through, about 30 minutes. Uncover and continue with the last step.
- 6 tablespoons unsalted butter (3/4 stick)
- 1/2 cup packed dark brown sugar
- 1/2 cup water
- 1 tablespoon kosher salt
- 1 teaspoon ground ginger or 1/4 cup finely chopped candied or crystallized ginger
- 4 pounds Garnet sweet potatoes, peeled and cut into 1-inch cubes
- 4 cups mini marshmallows