Follow these simple steps to create your moist and flavorful spice cake:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, baking soda, cinnamon, ginger, nutmeg, allspice, and salt until well combined.
3. Mix Sugars: In another bowl, combine granulated sugar and brown sugar. Mix in the vegetable oil until smooth.
4. Add Eggs: Incorporate the eggs one at a time into the sugar mixture, ensuring each is fully blended before adding the next.
5. Incorporate Buttermilk: Gradually mix in the buttermilk and vanilla extract until smooth.
6. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, stirring until just combined. Be careful not to overmix.
7. Divide Batter: Pour the batter evenly into the two prepared cake pans.
8. Bake: Place the pans in the preheated oven and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
9. Cool Cakes: Once baked, remove the cakes from the oven and let them cool in the pans for about 10-15 minutes. Then transfer to wire racks to cool completely.
10. Frost and Decorate: Once cooled, frost with your favorite cream cheese frosting or leave it plain for a more rustic look.

By following these steps, you’ll soon enjoy a deliciously moist spice cake that will impress everyone at your table.