I made one substitution--I used chopped peanuts in place of the sunflower seeds only because that was what I had on hand. The chocolate chips I used were mini and the peanut butter I used was Extra Crunchy Jif. I followed the directions exact, they were simple and right on point. These turned out great, my family loved these. I think these would be just as good if I omitted the brown sugar. I'm going to try another batch in a couple days and see if my family likes them as much as them without the extra sugar, then update my review.

These bars don't hold together when they are cut - can anyone suggest what might have gone wrong?

Easy to make and taste great. Pressed them into the pan to help them hold together better. Possibly cut back a 1/2 cup of cereal next time to help them hold better!