Preheat your oven to 350 degrees Fahrenheit.
In a large bowl, combine the melted butter, brown sugar, white sugar, vanilla and pureed pumpkin with a wire whisk until smooth.
Add the flour, salt, baking powder, baking soda, and spices.
Combine everything together with a rubber spatula, scraping down the sides of the bowl and mixing just until combined.
Fold in the chocolate chips.
Roll tablespoons of dough into balls and place on a baking sheet lined with parchment paper. Press the balls down slightly before baking.
Bake at 350 degrees for about 9 or 10 minutes, just until the tops of the cookies lose their shine.
Leave the cookies to cool on the baking sheet for 5-7 minutes before transferring them to a wire rack to cool completely.
These cookies keep well in an airtight container for several days at room temperature. They also freeze well in an airtight container or resealable freezer bag.