An inside look at how the Girl Scouts chose their next cookie flavor, Raspberry Rally

The Girl Scouts website calls Raspberry Rally a "thin, crispy cookie infused with raspberry flavor and dipped in chocolaty coating." (Girl Scouts of the USA)

A new Girl Scout cookie has joined the lineup. Meet Raspberry Rally, which is being called the sister of the iconic Thin Mint. Or is it a challenger?

“We hope that we’ll hear some healthy competition from folks – maybe a little Thin Mint-Raspberry Rally battle,” Wendy Lou, the chief revenue officer of Girl Scouts of the United States of America, told NPR.

Usually, Girl Scouts launches a cookie with a new design, totally unlike its predecessors. Reimagining a cookie with an existing format is something new for them, Lou said. But while the Raspberry Rally may be comparable to a Thin Mint, Girl Scouts still had to develop its flavor and internal color.