Heat your oven to 350°F and position a rack in the middle. Get a 10-cup bundt pan ready (don’t grease it just yet).
Mix flour, baking powder, baking soda, cinnamon, ginger, nutmeg, and salt in a bowl. Put it aside.
In a glass measuring cup, whisk together apple cider and applesauce (or apple butter). Set this aside as well.
In a stand mixer with the paddle attachment, beat butter, oil, granulated sugar, and brown sugar for 2 minutes.
Add eggs and vanilla, mix until combined, and scrape the bowl as needed.
Gradually mix in the flour in three parts and the apple cider in two parts, starting and ending with flour. Beat well after each addition.
Gently stir the batter with a rubber spatula, but don’t overmix.
Grease a 10-cup bundt pan well (baking spray with flour works great).
Pour the batter into the pan and spread it evenly.
Bake for 45-50 minutes, or until a toothpick inserted in the center comes out clean.
Cool the pan on a wire rack for 15 minutes. After cooling, carefully flip the cake onto the rack.
Place a large piece of parchment or foil under the rack and add the topping while the cake is still warm.