Cream sugar and remaining butter until light and fluffy, 5-7 minutes.
1 ½ cups butter, 3 cups sugar
In a separate bowl, whisk the flour, baking powder, baking soda and salt.
4 ½ cups flour, 3 teaspoon baking powder, 1 teaspoon baking soda, ¾ teaspoon salt
Add eggs, 1 at a time until just combined. Stir in vanilla. Alternately add the flour mixture and the buttermilk, starting and finishing with the flour. Stir in 2 cups of toasted pecans.
6 eggs, 3 ½ teaspoon vanilla extract, 1 1/2 cups butter milk
Pour batter into 3 greased 9-inch round baking pans. Pour balance of batter into cupcake pan lined with cupcake liners. Bake at 350° for 25-30 minutes or until a toothpick inserted in center comes out clean. Cool for 10 minutes and remove from the pans. Allow to completely cool on wire racks. Note if you have extra batter, you can make cupcakes.