A liner that can be used for baking. The liner includes an aperture such that the liner can be placed into a mold that also includes an aperture such that the aperture of the baking liner and the mold are at least partially aligned and, a substance to be baked can be injected into the mold through the aperture of the mold and the aperture of the liner. The liner may include one or more wings that at least partially cover the aperture and that can be folded through the aperture of the mold and against a surface of the mold to hold the liner in place. After baking, the one or more wings can be folded back over the aperture to at least partially cover the aperture.