Directions

1. Preheat oven to 350 degrees.
   

2. Scrub the sweet potatoes and cut off the tips. Bake for 1 hour or until soft in the center when poked with a fork. When cool enough to handle, peel the potatoes and cut in half lengthwise and then into 1/2-inch-thick slices. Lay the slices in an oblong baking dish, overlapping slightly as needed.
   

3. Melt the butter in a medium saucepan over medium heat. Add the brown sugar and milk and bring to a boil, stirring constantly. Let the mixture thicken slightly. Remove the pan from the heat and add the powdered sugar; whisk until smooth.
   

4. Spread the sugar mixture over the sweet potatoes. Place a walnut half on each slice. Bake until bubbly and slightly browned, about 20 minutes.