*Gluten-free adaptation: I recently tested this recipe with gluten-free graham crackers crumbs, and with a small adjustment, ended up with a fantastic outcome. I needed more crumbs (I used a full 8-ounce (226g) package of Suzie-Uie crumbs; I believe other brands like Kinnikinnick would work as well–note that package sizes vary) to achieve a sturdy base. The crust was wetter and more difficult to spread, and I found that reserving a scant quarter cup of the crumbs and then dusting them over the crust as I spread it made the mixture easier to evenly distribute over the pan.
*For seven layer bars: You may use 1 cup each chocolate and butterscotch or peanut butter chips.