When I opened my package of frozen mango pieces for my cake, I saw that the mango pieces were absolutely covered in sheets of ice across both sides of the package, and the mango themselves looked brown instead of the yellow-orange I was expecting.
I decided to play it safe and not use them for the cake, substituting in some frozen mixed berries instead, but that leaves me with one big question: can mangos spoil when left in the freezer too long? The best before date on them was several years ago, but they've been stored in the freezer in an airtight plastic bag (never opened). Would this just be freezer burn? I don't think that they could have fermented or rotted while at frozen temperatures, right? Could there be some other spoilage reaction (oxidation with the air in the bag)?
If they were just freezerburned, they'd still be safe to eat, right?