MIAMI, FL - JANUARY 16: Nestle Butterfinger and Butterfinger Cups are seen on a store shelf, the day the company announced plans to sell its US candy business on January 16, 2018 in Miami, Florida. Nestle has agreed to sell its U.S. confectionery business to Italy's Ferrero for $2.8 billion. (Photo by Joe Raedle/Getty Images)

Kit Kat just announced its first new permanent flavor in almost a decade.  Mint chocolate Kit Kats are coming in December . . . mint on top, dark chocolate on the bottom, and wafers inside.

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Kit Kat launching first new permanent U.S. flavor in a decade - mint and dark chocolate

Kit Kat bars are going green. For the first time in nearly a decade, the chocolate-covered wafer treat will be available a new year-round flavor. Called Duos Mint + Dark Chocolate, it'll be a mashup of mint crème on the top and dark chocolate on the bottom, surrounding the classic crispy wafers.