Mix flour, baking soda, and baking powder together and set aside
Using a stand or hand mixer, cream butter and sugar until light and fluffy
Beat eggs in one at a time, then stir in vanilla
Mix part of the flour mixture in, and then part of the buttermilk, alternating until all is combined.
Pour batter in prepared baking pans
Bake at 350 F for 35-40 min or until knife inserted into the center comes out clean
Cool completely before frosting and assembling cake