Preheat an oven to 300ºF. Line a large baking sheet with parchment paper or silicon baking sheet.
In a food processor fitted with the metal blade or blender, combine the chocolate and brown sugar and process until the chocolate is very fine.
Sift together the flour, cocoa, chai powder, baking soda and salt into the chocolate-sugar.
In the bowl of a mixer, combine the eggs, vanilla extract and chai concentrate. Using the paddle attachment Set mixer to med-low and beat. Reduce the speed to low