Preheat the oven to 350 degrees.
Use cooking or baking spray to thoroughly grease 3 9-inch round cake pans, then add a layer of parchment paper on the bottom.
In a large mixing bowl using a hand or a stand mixer, combine wet ingredients with granulated sugar (sugar, oil, eggs, pumpkin puree).
In a separate bowl, whisk together dry ingredients (flour, pumpkin pie spice, salt, baking soda).
Add the dry ingredients to the wet ingredients in 3-4 portions, mixing well after each addition. Scrape down the bowl once complete.
Use a food scale to evenly distribute the batter throughout the 3 prepared cake pans.
Bake for 18-24 minutes or until the edges are brown and a toothpick comes out clean.
Remove them from the oven and let them cool to room temperature. Then cover and freeze them for 1-2 hours.