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There have been a lot of requests for blanching veggies as of late so here's an easy timetable to follow. Be sure to check tenderness part way into the blanching guide times because freshness and size of vegetables vary and can affect how long they truly need to blanch.
Be sure to give the veggies an immediate ice water bath after the blanching to stop the cooking process. Pat veggies dry if you are going to be freezing them and remove as much air from the freezer bag as possible because both help to reduce freezer burn.
Source: Collected over the years and finally decided to get them all organized ;-)
By Ann from Richland, WA
Blanching also diminishes the number of microorganisms that may be present on foods and brings out the color in green vegetables.
When water blanching, start counting time as soon as the water returns to a boil after placing vegetables in the water. If the water takes longer than 1-2 minutes to return to a boil, consider blanching smaller batches of vegetables at a time. Blanching times for boiling bags is approximately double that of water blanching.
Drain extra moisture after cooling to avoid a loss of quality during freezing.
Recently while trying to blanch/freeze 12 lbs. of green beans, I ran out of ice to cool the blanched beans. Instead I used some drink boxes, that I always keep in the freezer to use in lunchboxes to keep food cold until lunch time.
I use a plastic mesh lemon bag to blanche my veggies in boiling water before freezing. I bag them in quantities ready for recipes so they are ready to pull from the freezer any time I need them. By K. Cooper
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I got a food dehydrator for Christmas and have been experimenting with it recently. I was doing some research on blanching and if it is necessary. It sounds like it is very necessary for some vegetables, like potatoes and tomatoes and less so for others, like zucchini or onions. Like freezing, if you don't blanch before processing, enzymes, bacteria and other unwanted substances can remain in your dried food. This can reduce the nutritional content or even cause the food to spoil. So, I'll choose to blanch some veggies before drying.
Water blanching, which is what I usually do with tomatoes, is not recommended for dehydrating. They recommend steam or microwave. I recently got an Instant Pot pressure cooker with a steamer basket. It seems like the perfect solution for blanching. Online, they recommend cooking for one minute at the highest pressure for vegetables. But that is for full cooking, not just for blanching.
Any recommendations on what to set my Instant Pot to in order to blanch vegetables like potatoes, tomatoes and carrots?
You can steam the tomatoes for 0 minutes and then do a natural release. The skins will slip off
Why is it necessary to blanch vegetables prior to freezing? Why can't I just wash, drain, cut, and freeze the raw green beans?
I think you can but the blanching, if I remember correctly helps to keep frost from forming on them. The proper procedure is to blanch them for one minute, plunge them in ice water for a minute then lay them on a towel to dry. It is worth it if you have a better product in the end.
It's to preserve the color, keep crisp yet tender and halts the enzymes that deteriorates the nutritional value of the food during storage. Also, assorted veggies need different amounts of blanching time. For instance, beans should be blanched for 3 minutes, corn on the cob for 4 minutes and beets anywhere from 25 to 50 minutes depending on their size. All varieties of onions and peppers do not need to be blanched.
Blanching vegetables and sometimes fruits is necessary before freezing to destroy enzymes and bacteria that could cause spoilage. It also helps to preserve a vibrant color on the frozen product. Plunging the vegetables in ice water stops the cooking process.
Jackie, I do blanch somestuff like any beans,if you don't they will freezer burn and have a freezer taste. I do know I put corn up this year and I didn't blanch it and eat taste good. And I don't blanch greens either,but you must get all the air out of it. But on all beans and peas I wouldn't blanch. Happy Day.
How do I blanch vegetables, such as corn?
Wiser ones might correct or add to my answer, but blanching as I understand such is merely placing the food (usually fresh vegetables or fruits) into a pot of boiling water for 1-2 minutes and then immediately submerging them into ice water to stop the cooking process. I use the process when preparing fresh vegetables (such as corn on the cob) for freezing. It also works well when preparing a batch of fresh tomatoes for processing as after you remove the tomatoes from the ice water, you can literally slide off the skins with your hands. Good Luck!
If I remember right there are different directions for different types of food. As far as freezing tomatoes goes, all most of the people that I know, do is wash them, remove the stems and toss them in a plastic bag and then into the freezer. Then when they get a few more tomatoes they do the same thing, adding them to the previous bag.
KansasCindy's response gives the correct definition of blanching. However, the blanching time varies depending on the vegetable. Some require no more than 1-2 minutes; others may require 3 minutes or more. Thriftyfun has a guide to blanching on the website. You could also consult the Ball Book of Canning and Perserving for information.
Why do we blanch veggies before freezing?
By Guy T.
To stop the enzymes in the foods. Otherwise the food will continue to ripen and become mush.
I think the blanching breaks down the plant cells. Then the moisture in them does not freeze and burst, that changes the texture of the food.
Blanching slows or stops the action of enzymes which cause loss of flavor, color and texture. Blanching also cleanses the surface of dirt and organisms, brightens the color and helps retard loss of vitamins. Blanching also wilts or softens vegetables and makes them easier to pack.
Is blanching required for freezing yellow squash, cabbage, corn, and broccoli?
By Jackie from Sweetwater, TN
Blanching stops the enzyme action and give far superior frozen veggies, that's why it is suggested that you do it. You'll live if you eat the veggies without blanching them, especially if they are frozen for only a short time.
But after putting so much work into growing them, don't you want your veggies to actually taste good and be in prime condition when you finally choose to eat them, and more so if you spend your hard-earned dollars on them? It's best not to take any short-cuts when putting food up.
I looking for information about blanching squash.
Linda from Roanoke, VA
Here's some info I had; hope it helps.
Copy printable Format: http://extensio odnut/gh1503.htm
Squash: summer (Cocozelle, Crookneck, Straightneck, White scallop, Zucchini)
Choose young squash with tender skin. Wash and cut in 1/2-inch slices. Water blanch 3 minutes. Cool promptly, drain, package, seal and freeze.
oGrated zucchini (for baking)
Choose young tender zucchini. Wash and grate without peeling. Steam blanch in small quantities for 1 to 2 minutes until translucent. Drain well and pack in containers in amounts needed for recipes. Cool by placing the containers in cold water. Seal and freeze. If watery when thawed, drain the liquid before using the zucchini.
Squash: winter (Acorn, Banana, Buttercup, Butternut, Golden Delicious, Hubbard)
Select firm, mature squash with a hard rind.
Prepare same as for pumpkin.
Select full-colored mature pumpkins with fine texture. Wash, cut into cooking-size sections and remove seeds. Cook until soft in boiling water, in steam, in a pressure cooker, in an oven or microwave oven. To cool, place pan containing pumpkin in cold water and stir occasionally. Remove pulp from rind and mash. Package, seal and freeze.
Small pumpkins can be pierced and baked whole on a tray in an oven or microwave oven until soft. After cooling, peel, remove strings and seeds and mash. Package, seal and freeze.
By Sandra from Altoona, WI