In a large bowl, combine the brownie mix, ground almonds, flour and baking powder.
In a small bowl, whisk eggs
Add to brownie mixture; stir until combined.
Divide dough into thirds. On a parchment covered baking sheet, shape each portion into a 7x3-1/2-in. rectangle.
Bake at 350° for 24 minutes or until firm in the center.
Remove from the oven; cool on baking sheet for 5 minutes.
Transfer to a cutting board; cut diagonally with a serrated knife into 3/4-in. slices.
Place cut side down on parchment paper.
Bake 7 minutes and flip to the other side for another 7 minutes or until firm
Cool on wire racks.
Drizzle with chocolate.