In the 1960's my mom used to make a special icing for a banana cake. Not sure it was called "frosty icing" all I remember and would like to find, is that it had to be mixed with a mixer in a "bain-marie" over hot water, there was cream of tartar in it, egg whites: I think and sugar for sure. It became very fluffy and soft to apply but after a couple of hours it would crack on top and be smooth under.
Thank you if you find the recipe!
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