Preheat the oven to 375°F and line the baking sheet with parchment paper. Set aside.
Place the chopped chocolate in a heatproof bowl and heat in the microwave at 20-second intervals. Stir after each time until it is smooth. Set aside to cool down.
¾ cup Semi-sweet chocolate
Sift all the dry ingredients, and set them aside.
1¼ cup All-purpose flour, ¼ cup Corn starch, 2 tablespoon Cocoa powder, 1½ teaspoon Baking powder, ¼ teaspoon Baking soda, ¼ teaspoon salt, 1 teaspoon Cinnamon, ½ teaspoon Ginger
In the bowl of a stand mixer set on the paddle attachment, beat the butter and the brown sugar until soft and creamy for one minute.
½ cup Butter, ½ cup Brown sugar
Add in the pumpkin puree and vanilla extract, and mix for another minute.
½ cup Pumpkin puree, 1 tablespoon Vanilla extract
Remove the bowl from the stand mixer. Using a rubber spatula, mix in the melted chocolate. Then gradually add the sifted dry ingredients. Gently fold it in. DO NOT OVERMIX.
Roll up a small amount of the dough in your hand and place them on the lined baking sheet.
Use a flat-bottom glass, dip it in powdered sugar, and shake off the excess sugar. Flatten the cookie dough.
Bake for 8-10 minutes, or until the edges are set. Remove from the oven and let cool completely before frosting.