Preheat the oven to 350℉ (180℃).
In a large bowl, sift together the flour, baking powder, baking soda and spices. Whisk together until evenly combined. Set aside.
In a separate large bowl, whisk together the oil, sugar, vanilla, eggs and apple sauce. Keep whisking until there are no lumps of sugar and you don't see any pieces of egg that are separate. You could also use an electric mixer for this step.
Whisk about ½ of the flour mixture into the oil mixture until there are no lumps.
Then whisk the sour cream into the flour mixture. Do this by hand.
Lastly, whisk the final ½ of the flour mixture into the wet ingredients. Do not over mix. Stop mixing as soon as you no longer see streaks or lumps of flour.
Spray a 12-cup bundt pan with non-stick cooking spray or grease and lightly dust with flour. Even if your pan is non-stick, you still need to grease the pan. Make sure that all the creases and crevices are greased. Pour/spoon the batter into the prepared pan.
Bake in the middle of the preheated oven for about 50-60 minutes, or until the cake is starting to pull away from the sides of the pan and an inserted toothpick comes out clean or with a few moist crumbs.
Cool the cake in the pan for at least 25 minutes, then very carefully invert the cake and let it slide out of the pan.