On stove mix sugar, butter, corn syrup, and water. Stir constantly until boiling. Pour over chocolate chips in large bowl and let set for 2 min. With mixer add eggs and vanilla. Add dry mixture.
Bake in 2 11x17 lined pans at 325° for 35 min. At 17 min, switch racks. Cookie sheets work best.
Add caramel or nuts if you want.