Preheat fan oven to 180°C. Mix the butter and sugar until light and fluffy. To the same mixture add the egg and vanilla extract. Next, add flour, cocoa powder, coffee and salt. Once combined gradually add the chocolate chips and mix with your hands into a dough.
Shape the dough into 15 even sized dough balls and place on a lined baking tray.
Flatten each cookie ball down with your hand. Bake at 180°C for approximately 12 minutes.
Whilst still warm decorate the cookies to create your reindeer faces.