*To melt fudge filling in microwave, heat for 30 seconds. Stir, then microwave for 10 second intervals, stirring until melted.
MAKE AHEAD INSTRUCTIONS: To make cookie dough one day ahead, prepare cookie dough. Cover the surface with plastic wrap and refrigerate in a covered container up to 24 hours. To make fudge filling one day ahead, prepare filling and chill for 1 1/2 to 2 hours. Roll filling into 1-inch balls and place on a parchment lined tray. Cover tightly with plastic wrap and refrigerate up to 24 hours.