For Cake: Heat oven to 350°F. Lightly grease 13x9-inch pan.
Stir together water, oil, eggs and quick bread mix until blended. Spoon batter into pan.
Bake 20 minutes or until toothpick inserted in center comes out clean.
For Vanilla Sauce: Stir together cream, sugar and flour in saucepan; cook over low heat until smooth. Add butter and cook, stirring constantly over medium heat until butter is melted and mixture begins to boil. Cook 3 minutes, stirring constantly until mixture is slightly thickened. Remove from heat and stir in vanilla. Serve warm.