Grandma Sofia's Fudge

I used to sit in my grandmother’s kitchen in Goleta, California and stir and stir this fudge.  I remember complaining about the constant stirring.  I didn’t complain about the end result.  If you don’t cook the marshmallow/sugar mixture long enough the fudge won’t set.  You’ll have mushy fudge that cannot be sliced.  It won’t be tragic, you just won’t be able to give them away.  You’ll have to eat them standing at the fridge with a spoon.  Really not such a bad outcome…  I made a batch recently with organic marshmallows (yes, they really make such a thing).  My sister thought that it “didn’t taste like Grandma’s fudge.”  Apparently if you want the “real” 1970s version you must use non-organic marshmallows.  Pick your poison.