Preheat oven to 350 degrees. Spray a 9x13 baking dish and set aside.
In a large mixing bowl combine the box mix and spices. Stir together.
Add the pumpkin puree, avocado oil, dairy-free milk, and vanilla. Stir together.
Add the shredded carrots and crushed pineapple. Fold into the batter. Batter will be lumpy.
Pour into the prepared baking dish. Smooth the top of the batter using the back of a spoon.
Bake for 50-60 minutes or until toothpick inserted into center of cake comes out clean.
Remove from oven, let cool before cutting into pieces and serving.
If desired, place 2 tablespoons of powdered sugar in a sifter and gently sift a light dusting of sugar on top of cake before serving.
Store leftovers in a covered glass container. No need to refrigerate. Will stay fresh for up to 4 days. Freezes great!