A stocking full of coal might not be such a bad gift after all: These lumps are Rice Krispies Treats! To make some, prepare a half batch of the treats as the box directs, then shape into small irregular lumps while still warm. Microwave 16 ounces chopped dark chocolate in 30-second intervals until melted. Dip the treats in the melted chocolate and place on a parchment-lined baking sheet. Let set slightly, then roll in black cocoa powder or finely ground chocolate wafer cookies.