In a stand mixer or large bowl using a hand mixer, cream together butter and sugar until smooth and creamy.
Stir in pumpkin, egg, and vanilla.
Add flour, baking soda, cinnamon, and salt, stirring until just combined.
Fold in chocolate chips.
Cover and refrigerate 1 hour or up to 48 hours.
Preheat oven to 350℉ and line cookie sheets with parchment paper.
Scoop cookie dough into 24 equal-sized cookie dough balls and place on prepared pan about 2 inches apart.
Bake in preheated oven for 12-15 minutes or until edges are golden and centers are just slightly wet.
Remove from oven and allow to cool for 3-4 minutes before transferring to a cooling rack to cool completely.
Store cooled cookies in an air-tight container at room temperature.