Who invented the candy twix cookie bars?

Forrest Mars Jr. $10.5 billion Candy. McLean, Va. 75. Married, 4 children John F. Mars $10.5 billion Candy. Arlington, Va. 70. Married, 2 children Jacqueline Mars $10.5 billion Candy. Bedminster, N.J. 67. Twice divorced, 3 children Grandchildren of Frank and Ethel Mars, candymakers who started selling chocolates from their kitchen in Tacoma, Wash. 1919. Father, Forrest Sr. (d. 1999), took reins, introduced malt-flavor nougat, which became core of Mars candy bar line: Snickers, Milky Way, 3 Musketeers. Also created Twix, M&Ms, Skittles. Obsessed with efficiency in factories: punctuality, measurement, quality. Added pet food (Whiskas, Pedigree), Uncle Ben's Rice, electronic components for vending machines. Today Mars is world's largest confectioner. Sales: $19 billion. Expanding pet food division: recently bought Doane Pet Care (makes Wal-Mart (nyse: WMT - news - people )'s Ol' Roy label) and the maker of Greenies, nation's top-selling dog treat.  more