I made some changes because it seemed like it would be too sweet as noted. I omitted the artificial sweeter and reduced the brown sugar to a lightly-packed 3/4 cup. I also added 1 tablespoon of oil just to make it a little more moist and tossed in 1/3 cup chopped raisins.
It was awesome! I've also tried it with chopped dates instead of raisins, which is equally good. Knitting Granny, thank you for providing such a great starting point for me to experiment with!