Blend together the crust ingredients until no chunks remain. Pat down in an even layer into your choice of size pan. You can use an 8x8 tray or a rectangular size. Since the base is not going to spread, you can shape it to fit as much of the tray you need.
In a small saucepan over low heat, melt the chocolate chips, constantly stirring.
Drizzle the melted chocolate chips over the peanut butter mixture in the pan, and let it harden in the refrigerator for an hour.
Once the bars are hardened, use a pizza cutter to cut into 12 small bars or 8 large bars before serving.
Notes
Storage
Store in an airtight container in the refrigerator for up to one week.