Line a baking sheet with parchment paper and set aside.

In a large mixing bowl, stir together the brownie mix, the included syrup, the eggs, and the melted butter until well combined.

Cover the bowl tightly and refrigerate the dough for 30 minutes. Meanwhile, preheat your oven to 350°F (175°C).

Pour the powdered sugar into a small bowl and set it aside for coating the cookies.

Scoop a heaping tablespoon of brownie batter into your hands and roll it into a smooth ball.

Coat the cookie dough ball thoroughly in powdered sugar.

Place the rolled cookie dough on the prepared baking sheet, leaving at least 2 inches between each cookie.

Bake for 11-12 minutes or until the edges are set but the centers look soft.

Allow cookies to cool on the baking sheet for about 5 minutes before transferring them to a cooling rack.