Place cup of coffee over batter and add soda to coffee. The chemical reaction should produce a great deal of foam which will probably over flow the cup and fall into the batter. After foam dies down, add the remaining coffee/soda mixture to batter.

Finally, add plumped raisins to batter. The batter will seem rather gooey or pasty but that's o.k.

Drop by tablespoons.

Bake at 375°F 11-12 minutes on standard cookie sheet. Place cookies on paper towels to "dry" before placing in the cookie jar (if any are left).