Preheat your oven to 350°F (175°C).
Grease and flour a 9x13 inch cake pan.
In a large bowl, combine flour, baking powder, baking soda, salt, and spices.
In another bowl, whisk together sugar and oil until well blended.
Add eggs one at a time, mixing well after each addition.
Stir in vanilla extract and buttermilk until smooth.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Pour the batter into the prepared pan, smoothing the top.
Bake for 35-40 minutes, or until a toothpick comes out clean.
Let it cool in the pan for 10 minutes before transferring to a wire rack to cool completely.