Scoop 3 tablespoons ginger dough and 1 ½ tablespoons brownie dough.
Split each portion in half so you have four pieces.
Arrange the pieces in your palm, alternating ginger and brownie (ginger → brownie → ginger → brownie).
Gently press the pieces together, then roll into a smooth ball.
Repeat with remaining dough.
Chill all dough balls for 30 minutes.
Preheat oven to 350°F. Line baking sheets with parchment paper.
Place dough balls at least 3 inches apart on the prepared sheets.
Bake for 12-14 minutes, or until the edges are set and the centers look just slightly underbaked. (They will finish setting on the pan.)
Let the cookies cool on the baking sheet for 5 minutes.
If desired, "scoot" the cookies with a round cutter to make perfectly even edges.
Transfer to a wire rack to cool completely.