"Marshmallow mixture" refers to a combination of ingredients that are blended together to create the soft and fluffy candy known as marshmallows. Full definition
Spoon marshmallow mixture into a piping bag fitted with a 1 cm plain tube and pipe marshmallow around the edge of half the biscuits. (mouthwateringmunchies.com)
Pour marshmallow mixture over cereal and coconut and mix until thoroughly coated. (holajalapeno.com)
Pour marshmallow mixture over caramel layer, spreading to edges. (piarecipes.com)