Preheat the oven to 375°F. Line a baking sheet with parchment paper or a silicone baking mat. Set aside.
In the bowl of of a stand mixer, mix together the flour, cocoa powder, baking soda, baking powder, salt, and the sugars until fully combined.
Mix in the butter and egg until fully incorporated.
Form balls of dough, and place on the prepared baking sheet. Flatten them a little with the back of a spoon.
Bake in the preheated oven for 8 to 10 minutes. While cookies are warm, pinch the cookies for ears, and use a fork to create whiskers for each cat. Decorate with candy corn for the eyes and swedish berries for the nose.