In a bowl, mix together the flour, baking soda, and salt. Set aside.
In a large bowl whisk together the pumpkin purée, butter, sugars, egg and vanilla until smooth.
Mix in the dry ingredients just until the dough comes together. Fold in the chocolate chips. Be careful not to over mix. Store in the fridge for 30 minutes.
Line a baking tray with parchment paper. Using a 2 tablespoon ice cream scoop, scoop out the cookie dough and place on the tray. Place few extra chocolate chips on top of each cookie. Place the tray in the fridge and let rest for at least 4 hours or overnight.
When ready to bake, preheat the oven to 180°C or 350°F and line a large baking tray with parchment paper.
Place the cookies on the tray leaving space between them. Bake the cookies for 12-14 minutes, until the edges have a nice golden colour. Keep the rest of the dough in the fridge while cooking the cookies.
Once ready, let the cookies cool slightly in the tray then transfer to a cooling rack. Let the cookies cool to room temperature before eating. Enjoy!