Black Chocolate Crinkle Cookies

1. Melt the chocolate using a double boiler or in the microwave, stirring every 30 seconds. Set aside to cool.
2. In a small bowl, combine the flour, cocoa powder, baking powder, and salt. Set aside.
3. In a medium bowl, beat the butter and brown sugar together until light and fluffy, about 2-3 minutes. Add the egg, vanilla, and melted chocolate and beat until combined. On low speed, beat in half of the flour mixture, then the milk, and then the second half of the flour mixture. Beat until combined.
4. Wrap the dough in a piece of plastic wrap and chill in the refrigerator until firm, about 2 hours.
5. Preheat the oven to 350 F. Line two baking sheets with parchment paper. Place a couple spoonfuls of granulated sugar in a small bowl and a couple spoonfuls of powdered sugar in a small bowl.
6. Make 6 1-inch dough balls and 12 ½-inch dough balls. Roll each dough ball in granulated sugar and then in powdered sugar. Place the 6 large dough balls on the one baking sheet, 2 inches apart from each other. Place two small dough balls at the top of each large dough ball to make Mickey ears.
7. Bake for 14 minutes or until the top surface is cracked. Place the entire baking sheet on a wire rack and let cool.