To prepare a pumpkin pecan white chocolate cookies recipe, first you will need to prepare your ingredients. First, you'll need: White Chocolate Chips (optional) - You can use regular, semi-sweet, or milk chocolate chips. You will also need white sugar, baking powder, salt, and vanilla extract. Then, add your dry ingredients to the wet ingredients and mix until the mixture is just combined. If you don't have pumpkin pie spice, use nutmeg or cinnamon instead. Using an electric mixer, cream the butter and sugar together until light and fluffy. Add in the vanilla and the pumpkin puree. Scoop the batter into your prepared cookie sheet. Bake the cookies for 12 to 15 minutes or until they are lightly browned. Remove from the oven and let cool for 5 minutes before transferring them to wire racks to cool completely.