For classic baked whole sweet potatoes, a good target is 400°F (about 200°C) for 45–60 minutes, until they’re very soft when pierced with a fork.

Quick Scoop

  • Whole sweet potatoes:
    • Most home cooks and recipes use 400°F as the “sweet spot” for fluffy, creamy insides and lightly crisp skin.
* Bake about 45–60 minutes depending on size; larger ones can take closer to an hour.
  • Hotter and faster:
    • For cubes or wedges, 425°F is common, roasting around 30–35 minutes until browned and tender.
  • Even hotter (very caramelized):
    • Some methods go up to 450°F for extra caramelization, but you need to watch closely so they don’t burn.

Simple whole-baked method

  1. Preheat oven to 400°F (200°C).
  1. Scrub potatoes clean and dry them well.
  1. Pierce each several times with a fork so steam can escape.
  1. (Optional) Rub with a little oil and sprinkle with salt for nicer skin.
  1. Place on a foil- or parchment-lined tray.
  2. Bake 45–60 minutes, until a fork or knife slides in with almost no resistance.

Rule of thumb:

  • Whole, uncut: 400°F, 45–60 minutes.
  • Cut into chunks: 425°F, about 30 minutes.

TL;DR: If you’re wondering what temp to cook sweet potatoes in the oven and don’t want to overthink it, set the oven to 400°F and bake until they’re very soft inside.

Information gathered from public forums or data available on the internet and portrayed here.