Marshmallow Fluff, manufactured by Durkee-Mower, does not bear an O/U symbol on some 16 oz. containers due to a printing error, but it is, in fact, Kosher and pareve.

Pas Yisroel during Aseres Yimei Teshuva
אלול — Guidance for Aseres Yimei Teshuva: Pas Akum, Pas Yisroel, and Rosh Hashana By Rabbi Eliezer Eidlitz Main Ideas During Aseres Yimei Teshuva, the