Preheat oven to 375℉ and line a muffin pan with muffin papers.
In a large bowl, beat together pumpkin puree, vegetable oil, sugar, eggs, and milk until well combined.
In a separate bowl, whisk together flour, baking powder, pumpkin spice, and salt.
Stir dry ingredients into the wet ingredients until just combined.
Fold in chocolate chips.
Fill paper lined muffin cups evenly with batter.
Bake in preheated oven for 18-22 minutes or until centers of muffins are cooked.
Allow to cool in pan for 2-3 minutes before transferring to a cooling rack to finish cooling.
Store in an air-tight container for up to 3 days.