Some recipes substitute brown sugar for granulated sugar in the dough too, but, I like my dough recipe so much I have never taken that leap - of - faith. (sbnation.com)
In a separate small bowl, combine 1/4 cup granulated sugar with 1 1/4 tsp cinnamon. (easydessert.org)
Therefore, if you are looking for a true «sweet treat,» I would recommend adding an extra 1/4 -1 / 2 cup of granulated sugar of choice into the filling. (beyondthebite4life.com)