Preheat oven to 350°F. Line baking sheet with parchment paper.
In a large bowl, beat the butter and sugar until creamy. Mix in the egg and vanilla until combined.
In a separate mixing bowl, whisk the flour, cocoa powder, baking powder, and salt. Gradually add the dry ingredients into the wet ingredients until just combined.
Roll the dough onto a clean floured working surface, no thinner than ¼-inch thick. Continue to flip and flour the dough as you roll. Use a gingerbread man cookie cutter to cut out wookie shapes. Place onto prepare baking sheet.
Press tongs of a fork into the wookie cookie dough to create the "hair". Bake 7 to 10 minutes, depending on the thickness of the cookies. Remove from oven and let cool 10 minutes on cookie sheet before transferring to wire rack to cool completely.
Once cookies are completely cooled, decorate as desired. I like to use a small star tip to pipe the sash and then sprinkle pearls over top. Keep it simple.
