01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, pumpkin pie spice, cinnamon, baking soda, salt, and instant espresso powder.
03 - In a large bowl, beat softened butter, brown sugar, and granulated sugar until light and creamy.
04 - Add egg, pumpkin puree, and vanilla extract to the butter mixture and mix until combined.
05 - Gradually add dry ingredients to the wet mixture, stirring just until incorporated. Avoid overmixing.
06 - Scoop tablespoon-sized portions of dough onto prepared baking sheets, spacing cookies 2 inches apart.
07 - Bake for 11–13 minutes until edges are set and centers appear slightly underbaked. Cool on the pan for 5 minutes before transferring to a wire rack.
08 - In a small bowl, whisk powdered sugar, brewed espresso, milk, and pumpkin pie spice until smooth and pourable.
09 - Drizzle glaze over fully cooled cookies. Allow glaze to set before serving.