Preheat oven to 350 degrees F. In a large bowl, mix up your ground flax seed meal and water and let sit for a few minutes so it can gel up.
Once the flax egg has reached an egg like consistency, add the creamy peanut butter, sugar, baking soda, and salt and mix until well combined. Stir in the semisweet chocolate chips.
Chill the dough for about a half hour. Then drop dough, about a tablespoon at a time on parchment lined cookie sheets.
Bake at 350 degrees F until cookies are golden, about 12 to 14 minutes. These cookies are fragile when warm, so cool for about 10 minutes on sheets; transfer cookies to racks to cool completely.
Notes
These will keep in an airtight container for up to a week, but they are best consumed within a few days.If you can't eat nuts, you can make these with sunbutter. If you use sunbutter, reduce the baking soda to ¼ teaspoon so that the cookies don't turn green.