In the bowl of a stand mixer, combine the softened butter, sugar and brown sugar. Cream until smooth.
Add the molasses, egg and vanilla. Mix to combine, scraping the sides as needed.
Add the flour, ginger, cinnamon, nutmeg, pumpkin pie spice, baking soda and salt. Mix-in the dry ingredients just until they are combined.
Use a cookie scoop to scoop out ½ tablespoon of cookie dough. Roll into a ball and place on a sheet of parchment.
Using a round teaspoon, a spoon, or the tip of your finger, indent the center of each dough ball. Chill in the fridge for about 30 minutes to 1 hour.
Preheat oven to 350 degrees.
Bake the cookies in the oven for 8-10 minutes, or until the edges are set.
If needed, re-indent the center of each cookie and allow to cool.
Make the filling by combining white chocolate chips and heavy cream in a small saucepan. Melt the chocolate over low heat and stir constantly until it is smooth and melted. Remove from heat.
Add the ginger, nutmeg, cinnamon and molasses to the white chocolate mixture. Transfer the filling to a piping bag, or use two spoons to fill the center of each cookie. You need to work quickly before the filling sets up. If needed, reheat just until softened again.
Allow cookies to sit so that filling sets.
Melt white chocolate and drizzle over the filled cookies. Allow to set.
Notes
Store cookies in an airtight container in the refrigerator for up to 3 days.If you don't have pumpkin spice, use 1/4 teaspoon cinnamon and 1/4 cloves instead.