Oooo! Fancy deluxe! Well, actually these are perfectly adequate chocolate covered grahams. The aspect ratio is good for doing large-scale models of (e.g.) 8-pin DIP packages. These are the ones that we made into 555s.
Part of the circuitry snacks project: Edible models of functioning electronic circuits. Designed for fun, for geeks, for kids, and for teaching and learning electronics.