I’ve made fudge several times and it usually works. I heated the sugar, evaporated milk,& butter to a rolling boil til it reached the soft ball stage on my candy thermometer. I may have heated it too fast this time tho. Once I removed it from the heat and stirred in the marshmallow cream & baking chocolate, it had a grainy look. It looks & tastes like the sugar didn’t dissolve. Is there any way to fix it now?