Joyce's Rhubarb Pudding

From darlene kossman.

Batter: mix all together and pour into greased 8x10.

Filling : mix everything but boiling water.

Pour into batter.

Cover with boiling water.

Bake 325 degrees', no baking time is given so i'm guessing 25 minutes or until done"]".

sugar, vanilla, egg, butter, baking powder, salt, milk, flour, rhubarb, water