Brown the Butter
In a medium saucepan, melt the butter over medium heat. Continue to cook, stirring often, until it turns golden brown and starts to smell nutty. Remove from heat and let cool for 5–10 minutes.
Mix Wet Ingredients
In a large mixing bowl, combine the cooled brown butter, maple syrup, pumpkin puree, brown sugar, and granulated sugar. Beat until smooth and creamy. Add vanilla extract and mix until combined.
Combine Dry Ingredients
In a separate bowl, whisk together the flour, baking soda, salt, and pumpkin pie spice. Gradually add the dry ingredients to the wet ingredients, mixing just until combined. If using white chocolate chips or pecans, fold them in at this stage.
Chill the Dough
Cover the dough and chill in the refrigerator for at least 1 hour. This step is crucial to prevent the cookies from spreading too much while baking.
Preheat the Oven
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper or a silicone baking mat.
Shape the Cookies
Using a cookie scoop or tablespoon, drop rounded scoops of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake the Cookies
Bake for 10–12 minutes, or until the edges are set and the centers look slightly underdone. The cookies will continue to firm up as they cool.
Cool and Enjoy
Let the cookies cool on the baking sheet for 5 minutes, then transfer them to a cooling rack to cool completely.