Preheat the oven to 350 F and line your cookie sheet with parchment paper.
In a large bowl, cream butter and sugar together.
Add vanilla and egg.
Mix until well combined.
Add remaining dry ingredients to the wet ingredients and mix again.
Stir white chocolate chips into the flour mixture to form a cookie dough.
Use a cookie scoop to drop dough balls onto the prepared baking sheet.
Bake for 10-12 minutes, until the edges just start to turn golden brown.
Move to a wire rack to cool and, once fully cooled, store in an airtight container.
Notes
If the dough appears a little dry, add 1-2 tsp of water if needed.If you do not have pumpkin spice mix, use vanilla instant pudding mix instead and add one extra teaspoon of pumpkin pie spice.