Sweet potato dog chews Ingredients 2 sweet potatoes Directions Preheat oven to 250 degrees F. Wash sweet potatoes Slice sweet potatoes lengthwise about ¼ inch thick. Place on a baking sheet. Bake for 3 hours. Turn slices about halfway through baking. Cool on wire racks after baking. Store in refrigerator for up to 3 weeks or freeze for up to 4 months.