I had 4 mashed potato servings in the freezer from last year. They had a small amount of ice on each one, but guess what....
...we baked them up the other night, and they tasted absolutely fine. No freezer burn taste. Just delicious-ness. They are not yellow, that was the lighting that evening, as it was dark outside and raining. Oh, the rain fell, and fell and fell and is still falling today.