3 pounds while sweet potatoes, pricked with a fork
1/2 tsp. salt and freshly ground pepper to taste
1/2 cup buttermilk
1/2 cup whole milk
3 Tbsp. butter
Adjust oven rack to upper-middle position; heat to 425 degrees. Place potatoes on a foil-lined pan; bake 45-60 minutes, until tender. Peel when cool enough to handle. Puree with salt and pepper in a food processor (I used a blender). With motor running gradually add milks through feeder tube, then butter. Process until silken. Enjoy!