Bring the butter, water and vanilla to a boil.
Add the flour and stir constantly until it leaves the side of the pot and forms a ball.
Remove and cool.
Beat in 4 eggs, one at a time until smooth.
Drop by T. onto parchment lined cookie sheets
Bake at 400 degrees for about 25-30 minutes.
LET COOL.
Fill with ice cream and hot fudge