Preheat oven to 400 degrees. Bring water and butter to a boil in medium saucepan. Add flour stir with wooden spoon until it forms a sticky ball. Remove from heat beat in eggs one at a time with electric mixer, this will make your pastry. Spoon egg/flour mixture onto a pizza pan/cookie sheet in a ring (like an"O"). Bake at 400 for at least 45-50 minutes. Do not underbake. It should be a deep golden brown. Cool. Split top from bottom half. Beat heavy cream with vanilla and powdered sugar until soft peaks form.
Add 1/2 box instant vanilla pudding. Filling should be somewhat stiff. Spoon into bottom of ring and replace top. Soften fudge topping in microwave checking every 10- 15 seconds until soft but not liquid. Frost ring with fudge sauce refrigerate.