2000 - The KIT KAT BIG KAT wafer bar is introduced.

2002 - KIT KAT Limited Edition White Chocolate wafer bars and Dark Chocolate wafer bars are introduced.

2003 - KIT KAT expands its limited edition line to include mint and orange flavors.

2004 - KIT KAT BIG KAT Limited Edition White Chocolate wafer bars and KIT KAT Triple Chocolate wafer bars are introduced.

2004 - The KIT KAT White Chocolate wafer bar is made into a year round product.

2005 - KIT KAT Extra Crispy wafer bar is introduced.

2006 - KIT KAT wafer bar undergoes a formula change and features creamier chocolate.

2007 - KIT KAT Caramel wafer bar is introduced.