then when i defrosted them some carrots turned black. Why is that?
2006-10-18 06:23:59 · 11 answers · asked by Steveo 3 in Food & Drink ➔ Cooking & Recipes
Two things pop to my mind
1. Oxidation continues Even when frozen. This is what is called FREEZER BURN. Prevention, seal out air.
2. Some bacteria continue to be active even in a frozen environment. I think this is more likely. Prevention, wash, possibly a saline rinse.
Some things simply will not freeze well, when the water inside the cells freezes, it breaks the cell walls, and instead of a nice crisp veggie, you get veggie glop. Some unfreezable veggies (most notably lettuce) are FLASH FROZEN, using liquid nitrogen. The ultra fast speed of freezing creates ice crystals so small that the cells are not damaged. In fact, this process is also used for sperm, eggs, embryos and other animal cells, which remain viable after thawing.
2006-10-18 06:46:00 · answer #1 · answered by disco legend zeke 4 · 0⤊ 0⤋
If you want to freeze fresh veggies, then make sure you blanch them first (plunge them into boiling water for a few seconds, then into cold water to refresh them). Freezing breaks down the cell walls in the molecules of the food, because of the water ice-crystals' expansion, so unless you blanch them first, they will spoil when you defrost them.
2006-10-18 13:30:46 · answer #2 · answered by Anonymous · 0⤊ 0⤋
When water turns to ice it usually forms crystals. If you think about this on a cellular level, basically these crystals are like giant daggers that form on the inside of the cell wall and grow outward. In short, freezing causes a significant amount of cellular damage.
This shouldn't turn your carrots black, but it will change their texture.
2006-10-18 13:27:44 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Frost bite. You're supposed to blanch veggies before you freeze them. Which means you have to soak them in ice water for an hour or two, in order to close the pores in the veggies off and prevent freezer burning.
2006-10-18 13:27:59 · answer #4 · answered by Hailee D 4 · 0⤊ 1⤋
Did you defrost them in them microwave? If you let them defrost by their self I hav eno clue but don't eat them.
2006-10-18 13:26:37 · answer #5 · answered by jfurlerbaby23 2 · 0⤊ 0⤋
They must have gotten frost bitten in the freezer. Were they just in a zip lock bag or vacuum sealed??
2006-10-18 13:25:32 · answer #6 · answered by Niecy 3 · 0⤊ 0⤋
I always blanch my veggies before I freeze them and I have no problem at all.....
2006-10-18 13:27:43 · answer #7 · answered by chefzilla65 5 · 1⤊ 0⤋
They oxidized. To keep them from doing that, you need to either pre-cook them first (blanch) or flash freeze them.
2006-10-18 13:26:26 · answer #8 · answered by pknutson_sws 5 · 0⤊ 0⤋
Maybe they should have been blanched before freezing.
2006-10-18 13:25:40 · answer #9 · answered by Spud55 5 · 1⤊ 0⤋
Because you over heated them. If they are over heated, they burn.
2006-10-18 13:31:49 · answer #10 · answered by Sandy 2 · 0⤊ 0⤋