Preheat oven 325° F. Prepare Almond Pound Cake as directed. Let cool completely. Cut into 1 ½ inch cubes.
Sprinkle sugar over sliced peaches and let stand for 10 minutes.
Grill peach slices over medium heat until tender and slightly charred, about 2-3 minutes on each side.
Alternate cake cubes with peach slices and marshmallows on skewers.
Drizzle warm carmel sauce and walnuts (if desired) and serve.