This stuff is miraculous for baking. Things I've made in the past that stick with greasing and flouring do not stick after I use this stuff. And it's not just for baked goods. I use it for casseroles as well. It doesn't need refrigeration (within reason) so I mix up a small portion at a time and keep it in my spice drawer. It does separate a little so I stir it up before using it and use a silicone pastry brush to apply it to the pan.
1/4 cup oil
1/4 cup shortening
1/4 cup flour
Mix well. If there are tiny lumps, don't worry-they will brush out when you apply it to the pan. Brush on baking pans before filling them.