Preheat oven to 350°F (175°C) and line two baking sheets with parchment paper.
In a medium bowl, whisk together the flour, baking soda, pumpkin pie spice, and salt.
In a large mixing bowl, cream the softened butter and brown sugar until fluffy and pale.
Add the egg and vanilla extract to the butter mixture, beating until well incorporated.
Fold in the pumpkin puree until smooth.
Gradually add the dry flour mixture to the wet ingredients and mix until just combined.
Fold in the chocolate chips.
Drop rounded tablespoons of dough onto the prepared baking sheets.
Bake for 12 minutes or until the edges are set.
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack.