To bake sweet potatoes in the oven, follow these steps for perfectly soft and flavorful results:

1. Preheat the oven to 400°F (about 200°C). This temperature balances cooking time and the softening/sweetening of the potato flesh.
2. Wash and scrub the sweet potatoes to remove dirt, then dry them thoroughly.
3. Lightly brush or spray the sweet potatoes with olive oil and sprinkle with salt for flavor.
4. Place the sweet potatoes on a parchment-lined baking sheet with a rim to prevent rolling.
5. Bake for 40 to 90 minutes depending on size (smaller potatoes around 40 minutes, larger up to 90 minutes). The skin may crisp up and the inside should be very soft and creamy when done.
6. Optionally, flip the potatoes halfway through baking for more even skin crispiness.
7. Test doneness by poking with a fork; it should easily pierce the potato, and the skin may puff or pull away easily.
8. Let cool slightly before serving. Add toppings like butter, salt, or other favorites.

Baking at 400°F is preferred over higher heat (like 425°F or more) for creamier interiors. Some recipes recommend poking holes, but this is optional. Do not wrap in foil to keep skin crispy. Baking time will vary based on the potato size and how many are baking at once.

This method yields sweet potatoes with soft flesh and crispy skin, perfect for a nutritious side or base for various toppings.