- Preheat the oven to 325 degrees 
- Grease and flour three 8 x 2 inch round cake pans - In addition, we like to line the bottom of each pan with a circle of parchment paper. 
- In a medium size bowl add the flour, baking powder, baking soda, cinnamon, nutmeg, ginger and salt. Whisk at least 30 seconds to blend. Set aside. 
- In another bowl, add the pumpkin and milk. Stir to blend and set aside. 
- In the bowl of your mixer (fitted with a paddle attachment if using a stand mixer), mix the softened butter until smooth. Add the sugar and mix on medium speed 3 to 5 minutes or until light and fluffy. 
- Add the vanilla and oil and mix just until blended. 
- Add the eggs one at a time, mixing after each until the yolk is blended. 
- With the mixer on low speed, add the flour mixture and the pumpkin/milk mixture alternately. Begin and end with the dry ingredients (3 additions of dry and 2 of wet). After the last addition of dry ingredients, mix just until blended. 
- Fold in crushed ginger snaps. 
- Divide the cake layer between the three prepared cake pans. 
- Bake at 325 for 25 to 28 minutes or until a toothpick comes out clean or with just a few crumbs attached. 
- Allow the cake layers to cool in their pans on a wire rack for 10 minutes before turning them out.