Preheat the oven to 350 degrees, grease, flour and add a circle of parchment or waxed paper to three 8x2 inch round pans.
In a medium bowl, add the flour, baking powder, baking soda, salt and spices for 30 seconds. Whisk and set aside.
In another bowl, add the buttermilk, oil and vanilla. Set aside.
In the bowl of your mixer, add the butter and mix at medium speed until smooth. Gradually add the sugar (brown and white)
and continue to mix on medium speed for 3 to 5 minutes until lightened in color and fluffy. Add the eggs one at a time mixing until the yellow of the yolk disappears.
Alternately add the flour mixture and buttermilk mixture, beginning and ending with the dry ingredients (3 additions of dry ingredients and 2 of liquid).
Do not mix above medium speed or over mix the cake batter. Fold in chopped pecans.
Bake at 350 degrees for 25 -30 minutes or until a toothpick inserted in the center comes out clean or with just a few crumbs attached. Let cool 5 minutes and turn out.