Generally, no. But I'm sure there are cases that it would work.
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the sugar in the marshmellows can catch fire
Marshmallows are nearly all sugar, so 1 cup of marshmallows is pretty close to 1 cup of sugar.
Sugar and fat
Because they have sugar in them.
Yes. Marshmallows are made of corn syrup, sugar and gelatin. There is no fat in them.
Because the factorys put it there duhhh
Not usually. Marshmallows are a combination of egg white, glucose, sugar and gelatine. The sugar is necessary for bulk, (like in meringues) so is not usually replaced with acesulfame.
You use either albumen or egg white in marshmallows because it will make its texture light and fluffy. To make marshmallows, egg whites are beaten and then added to a sugar syrup and gelatin combination.
honey
It depends on the size of the package.
Scones are usually made without sugar.