We find that the best thing to use is butter or shortening with a small dusting of flour. A Bundt cake pan will be trickier to grease because of the intricate design of the pan which creates more crevices and nooks that also need to be greased and floured. u003cbr/u003eu003cbr/u003eIf you want to use a nonstick baking spray, you can, as long as it has flour in it. Regular cooking spray will not work as well and could leave a residue on your pan.