Preheat oven to 350 F. In a 9x13" pan spray with non stick spray or lay in a piece of parchment paper
Whisk together flour, baking powder, baking soda, salt, and apple pie spice.
In a different bowl beat butter until fluffy and then add sugar and brown sugar. Beat until completely combined together. Add the eggs and vanilla, beat again.
Add in applesauce and milk, beat until mixed. Slowly incorporate flour mixture and beat until just combined together. Fold in raisins and walnuts if desired.
Pour into your prepared baking dish and spread out evenly.
Bake for 30-35 minutes or until toothpick comes out clean with some crumbs attached.