1 Preheat oven to 350°F. For the Whipped Sweet Potatoes, pierce each potato twice with a fork so excess steam can escape while cooking. Microwave potatoes on HIGH 5 to 10 minutes or until tender, turning potatoes over halfway through cooking. Let stand 5 minutes or until cool enough to handle. Remove skin from potatoes.
2 Place potatoes, brown sugar, cream, butter, vanilla and pumpkin pie spice in large bowl. Beat with electric mixer on medium speed until smooth and fluffy. Spoon mixture into greased 13x9-inch or 3-quart baking dish. Top with marshmallows.
3 For the Streusel, mix flour, brown sugar and pumpkin pie spice in medium bowl. Cut in butter with pastry blender or 2 knives until crumbly. Stir in pecans and coconut. Sprinkle over top.
4 Bake 25 minutes or until heated through and topping is golden brown.