Step 1

Line 13 x 9-inch baking dish with aluminum foil so that foil extends about 2 inches over sides of dish; spray with cooking spray.

Step 2

In large saucepot, melt marshmallows, butter and vanilla extract over medium-low heat; fold in cereal. Firmly press marshmallow mixture into even layer in prepared dish; refrigerate 2 hours.

Step 3

Line 2 rimmed baking pans with parchment paper. Using overhanging sides of foil, transfer cereal bar to cutting board and remove foil; cut into 16 (3 x 2-inch) rectangles.

Step 4

Melt chocolate wafers as label directs; divide into 2 small bowls. Add yellow and red food coloring to 1 bowl; stir until incorporated. For Mummies, dip 8 rectangles fully in white chocolate to coat; place on 1 prepared pan and refrigerate 20 minutes. For Monsters, dip one end of remaining 8 rectangles halfway into orange chocolate to coat; place on remaining prepared pan, place candy eyeballs on chocolate as desired and refrigerate 20 minutes.

Step 5

For Mummies, reheat melted white chocolate wafers if it begins to harden; drizzle over Mummies to create "mummy wrappings." Place candy eyeballs on treats as desired and refrigerate 20 minutes or until chocolate hardens. Makes 16 treats.