Preheat oven to 350° and grease a 9x5 loaf pan. Set aside.
In a large bowl, combine butter, pumpkin, sugar, and dry pudding mix. Stir until smooth.
Add eggs and buttermilk and mix well.
Add flour, pumpkin spice, cinnamon, baking powder, and baking soda. Stir until smooth and no dry pockets remain.
Scoop into pan and bake for 45-50 minutes or until toothpick inserted in the center comes out clean.
Once fully cool, melt butterscotch chips with coconut oil and drizzle on top.