© Lucy Schaeffer
Active Time
25 MIN
Total Time
2 HR 50 MIN
Yield
Serves : 12

These mashed sweet potatoes are topped with Gruyère then baked so that the cheese forms a nutty-flavored crust.    More Sweet Potato Recipes  

How to Make It

Step 1    

Preheat the oven to 350°. Bake the sweet potatoes for 1 1/2 hours, or until tender. Raise the oven temperature to 425°.

Step 2    

Peel the sweet potatoes as soon as they are cool enough to handle; transfer to a bowl. Using a handheld electric mixer, beat the sweet potatoes with the butter until smooth. Beat in the cream, Gruyère, brown sugar and thyme; season with salt and pepper. Beat in the eggs one at a time, beating well after each addition.

Step 3    

Transfer the sweet potato puree to a buttered 8-by-11-inch baking dish and bake for 15 minutes. Reduce the oven temperature to 400° and bake for 30 minutes longer, or until the sweet potatoes are lightly puffed and browned. Let the sweet potato soufflé rest for 10 minutes before serving.

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