Oil or grease a jelly roll pan.
Mix the flavored sugar and corn syrup in a microwave-safe bowl.
Cover tightly with plastic wrap and microwave for 3 minutes.
Remove from microwave and stir. Cover again and microwave for another 2 minutes.
Add the sumac at this point, if you're making the Secunda version.
Remove from microwave, remove plastic wrap, and pour mixture onto oiled/greased jelly roll pan.
Let cool until hard.
Break into large chunks.
Put the large chunks into a heavy-duty freezer bag, seal, and break them by tapping firmly with the side of a wooden spoon.
Add powdered sugar to the bag and shake to coat pieces.
Store in an airtight container.