In the bowl of a food processor, pulse peanuts until the size of fine crumbs. Add the dates and process until everything is finely chopped and a sticky dough begins to form. The mixture should hold together when pinched between two fingers. If it appears dry, add water a few drops at a time and pulse until the desired consistency is reached.
Pour the dough onto a sheet of parchment or wax paper and press together to form a compact, flat square about 1 inch high. I like to cut pieces off when I’m ready to eat them to keep the rest of the batch fresh, but you can cut the whole slab into evenly sized squares and store in an airtight container in the refrigerator.