Preheat oven to 350℉ .
This recipe will make three 6” cakes (pictured here) or one 9” cake (which you can cut in half to make a 2-layer cake or decorate as a single layer cake).
Cut parchment paper to line the bottom of your pan or pans. Spray cake pan(s) with cooking spray, set parchment paper in the bottom, spray again then lightly coat with flour. Set aside.
Measure buttermilk in a liquid measuring cup and set aside. If using a milk and apple cider vinegar mixture, add 1 tsp of apple cider vinegar to a liquid measuring cup and fill to ½ cup with milk. Stir and set aside.
Sift flour, baking soda, baking powder, pumpkin pie spice, cinnamon and salt together three times and set dry ingredients aside.
In the bowl of a stand mixer fitted with the paddle attachment or in a large bowl if using a hand mixer, combine the eggs and both sugars. Mix on medium-high until color lightens and volume increases.
Reduce mixer to low speed and add oil, in a steady stream. Mix until combined.
Stop mixer to add canned pumpkin then mix until just combined.
Add buttermilk and vanilla and mix until just combined.
Remove the bowl from stand mixer or set aside hand mixer. Add flour mixture to the wet ingredients in a few batches and fold in by hand until just combined. Do not overmix.
Pour batter into cake pan(s). Optional: use kitchen scale to
Bake 6” cakes for 42-45 minutes and bake 9” cake for 55-60 minutes. Remove the cake pans halfway through bake time and wrap the edges of the pan in foil to prevent edges from browning too much.
Cake has finished baking when a cake tester or a toothpick comes out clean or with a few moist crumbs.