At Potluckiest we don't usually specify particular brands, but the Keebler cookies are a useful starting point — we can't vouch for another brand, and we've never tried making our own layered wafer cookies. As for the corn flakes, as much as we'd love to recommend some organic, non-GMO cereal, Kellogg's really has it over everyone else. We've tried. Where we've improved on the original is in the chocolate. Use high-quality chocolate — we use semi-sweet Guittard chips.