Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking powder, cinnamon, ginger, nutmeg, and salt.
In a separate large bowl, beat the butter and sugar until light and fluffy. Add the egg, vanilla, and milk, mixing until combined.
Gradually add the dry ingredients to the wet ingredients, mixing until a dough forms. Add a few drops of food coloring if desired and mix well.
Roll out the dough on a lightly floured surface to about ¼-inch thickness. Using a pumpkin-shaped cookie cutter, cut out 24 cookies. Transfer to the prepared baking sheet.
Use a small knife or tool to carve jack-o'-lantern faces into half of the cookies.
Bake for 10-12 minutes, or until the edges are lightly golden. Let the cookies cool on a wire rack.
Make the filling
In a small saucepan, combine the pumpkin puree, white chocolate chips, and pumpkin pie spice over low heat. Stir continuously until the chocolate is melted.
Remove from heat and stir in the heavy cream until smooth. Allow the ganache to cool and thicken slightly before using.
Assemble the sandwich cookies
Spread a generous amount of pumpkin ganache on the flat side of each whole cookie (the ones without faces).
Top with a jack-o'-lantern face cookie to form a sandwich.
Decorate with orange and black icing for an extra festive touch. (Optional)
Notes
If you don't want to use artificial food coloring, try these natural food coloring options:
Beet powder mixed with turmeric
Carrot juice concentrate
Paprika use sparingly
Keyword autumn recipes, cookies, Halloween recipe, home baking, homemade cookies