This chocolate rum cake recipe takes one hour and 25 minutes to prepare.  Ingredients 1 (18.25 ounce) package chocolate cake mix 1 (3.9 ounce) package instant chocolate pudding mix 4 eggs 1/2 cup water 1/2 cup vegetable oil 1/2 cup white rum 1/2 cup chopped walnuts 1/2 cup butter 1 cup white sugar 1/4 cup…