Preheat the oven to 350 F. In a medium bowl, mix together flour, salt, baking soda and cinnamon. In a large bowl, mix butter with pumpkin and both sugars until fluffy. Add in egg and vanilla extract until smooth.
Add in the flour mixture, and mix until it is fully combined. Fold in the chocolate chips. Evenly press the cookie dough into a greased 8-inch square baking dish. Bake for 20-25 minutes.