Preheat the oven to 350 F. In a large bowl, mix together brownie mix, eggs, and vegetable oil until smooth. Fold in the sprinkles.
In a shallow dish, combine granulated sugar and ground cinnamon. Roll the cookie dough into balls, then roll each one into the cinnamon and sugar mixture.
Place the cookies onto a large ungreased baking sheet at least 2-inches apart. Bake for 10-12 minutes.