No, but I've used the burner on the electric range--after it turns red just one touch and the marshmallow goes up in flames and you get a really crisp outside
Don't use my emergency candles for that but do often times roast marshmallows in my wood fireplace, they are so yummy!
I have never done that.
lol! Ya know, I think I've done that once with a candle. I do remember doing that with the stove burners when I was growing up.
No, they seem to flavor the marshmallows. I light smokes with mine.