Whole Wheat Butterscotch Zucchini Squares

I'm trying to make healthier dessert recipes, so this one uses all whole-wheat flour, lots of zucchini, and just a quarter cup of sugar in the whole thing! A lot of its sweetness comes from the butterscotch chips. I don't like butterscotch on its own, but I recently discovered that when you melt butterscotch chips, it makes an amazing base for blondies. I was looking around at zucchini brownies, in order to use up a baseball bat-sized zucchini in the fridge, but I realized we had some