My mom had a recipe from her mom for a chocolate fudge frosting. It was wonderful and easy to make.
I have made it for years, then about 10 years ago, I noticed that it just doesn't come out the same anymore. It is still good, but it seems to crystalize more than it used to. Before, when it set is had a very smooth texture, just like fudge, but now it sets, but the smoothness is gone and it doesn't melt in your mouth like it did long ago.
I wonder why?