Make candy treats. Melt light cocoa Candy Melts candy in microwave-safe bowl according to package directions. Mix chopped nuts and marshmallows in melted light cocoa candy until coated. Form mixture into rectangles, each 3 1/2 in. x 2 1/4 in., on parchment paper-covered cookie sheet. Place candy tombstone at top of each treat mixture. Chill until firm, about 10 to 15 minutes.