If you wish to bake this in a loaf pan, I used a 9x5 and baked it for an hour and it was perfect. Another reader said hers was not done after an hour, however, so you may test it with an inserted knife after that time and bake longer if needed. No additional leavenings are needed, but it's important to use the brown sugar as that activates the baking soda. If you want an extra-fluffy loaf, you could also add 1/2 teaspoon of baking powder. As always with leavenings, make sure they're fresh so they'll activate.
Sweet potato bread | www.homesicktexan.com