The only recipe you'll ever need for baked sweet potatoes. Crispy on the outside, savory on the inside. Top with butter and sea salt!
Preheat the oven to 400 F (see note about temperature variations).
Place the sweet potatoes directly on the oven rack, or, if you prefer, on a baking sheet. Bake for about 1 hour, or until an instant read thermometer reads between 205 and 210 F. You can also tell if they are done by piercing the flesh with a fork. If it slides in very easily, they're done.
If you are cooking a main dish in the oven at the same time, you can bake the sweet potatoes at any temperature between 350 and 450 F. At 350 F, they will take approximately 1 hour and 15 minutes. At 450 F, they will take approximately 45 minutes. Actual time may vary depending on how much food is being cooked in the oven. Use the doneness tests in the instructions to be sure the sweet potatoes are done.