I'm hoping to make rocky road ice cream and would prefer to use a marshmallow swirl rather than whole marshmallows. The problem, though, is that I can't seem to find a recipe for this so-called "marshmallow swirl." I know it is essentially egg whites, sugar, and vanilla, but I'm not sure what else. Marshmallow fluff is not going to fit the bill, as it is too thick and chewy. I'd like something thin (about the viscosity of corn syrup) that won't freeze firm--something that tastes and behaves like the marshmallow swirl in commercial ice creams. I'm also looking for something that doesn't have gelatin in it, (there is no reason for that to be there), as I don't eat gelatin. I have vegan mini marshmallows that I'm prepared to use if I can't figure out how to make the swirl, but the swirl would be ideal. I have the rest of the recipe so this is all I need to figure out before I can make it. Thanks in advance!