Most marshmallows are not halal or Kosher.
Some marshmallows are halal although it depends on the brand and type of marshmallows.
Not all marshmallows are halal although some are.
Most marshmallows are not halal or Kosher because they are made with gelatin that comes from pork.
If the marshmallows are made with beef gelatin that is halal then the marshmallows can be halal.
If the marshmallows are made with fish gelatin they are often considered to be halal.
Some marshmallows are also made using plant based ingredients including agar-agar or carrageenan which is halal.
Some marshmallows are also made with halal certified gelatin which means that the animals the gelatin comes from were slaughtered in accordance with Islamic law.
The types of marshmallows that are Halal include.
Campfire Beef Gelatin Recipe Marshmallows which are made with beef gelatin that is halal certified by Halal Transactions of Omaha.
And Ziyad Gourmet Halal MINI Marshmallows which are pork free, egg free, dairy free and gluten free and are made with halal certified beef gelatin.