Preheat the oven to 350°F and line a cookie sheet with parchment paper.
To a large microwave-safe bowl, add the butter. Soften in the microwave for 30 seconds.
Mix in the sugars.
Add the vanilla and egg until incorporated.
Pour in the flour, baking soda, pumpkin pie spice, and salt.
Fold in the white chocolate chips. (If you want the cookies to look like mine, reserve a few of the white chocolate chips to press into the tops of each cookie before baking.)
Using a 3-tablespoon scoop, drop dough onto the cookie sheet. (If you do not have a 3-tablespoon cookie scoop, you can use a tablespoon and just roll 3 total tablespoons into a ball.)
Bake for 11-13 minutes, or until the cookies are set. They will be puffy and should not appear wet.
Let the cookies come to room temperature before serving.