Should you grease a 8 round pan with butter flavor shortening or butter?

It is generally better to grease a baking pan with butter-flavored shortening rather than butter. Butter contains water, which can cause baked goods to brown unevenly and stick to the pan. Butter-flavored shortening, on the other hand, is made from vegetable oils and does not contain water, so it will not cause these problems. Additionally, butter-flavored shortening has a higher melting point than butter, so it will not melt and run off the sides of the pan during baking.