Spider: Cut a spider shape from peppermint patty using plastic knife. With icing, glue candies to body for black widow "hourglass," and sprinkles for hairy legs.
Eyeballs: Cut marshmallow in half widthwise. Draw "pupils" in the center with black icing and "bloodshot" squiggles with red icing.
Witches’ Brew: Pour milk into mug. Add chocolate syrup; stir. Microwave on high for 45 seconds, or heat in saucepan over low heat. Float eyeballs in brew.
Sit spider on edge of mug. If spider falls in, stir to make minty hot chocolate!