Preheat oven to 325° F. Prepare pans by using baking spray.
In the bowl of a standing mixer, combine flour, salt, sugar, & baking powder with a hand whisk. Add remaining ingredients and mix with the mixer on low speed. Increase speed to medium once most of the dry ingredients are moistened and mix for 2 minutes until well blended.
Pour batter into prepared pan and bake at 325° F until the center of each cake is done. You can test by inserting a toothpick in the center- when it comes out clean, the cake is done. Bake for 25-30 minutes for the 9” pan.