Preheat the oven to 375℉. Line two baking sheets with parchment paper or silpat mats.
In a medium bowl, whisk together the flour, baking soda, pumpkin pie spice and salt.
In a large bowl, use an electric mixer on medium-speed to combine the butter, brown sugar and white sugar until light and fluffy. Beat in the egg, pumpkin and vanilla. Add the dry ingredients and beat on low speed until combined. Stir in the chocolate chips. Cover the bowl with plastic wrap and refrigerate for 30 to 45 minutes (until well-chilled).
Roll the dough into 1-inch balls, and space 2-inches apart on the prepared baking sheets. Bake for about 12 minutes, until the cookies are puffed and the edges are golden brown.