Techniques › Vegetables, grains and beans
Blanching vegetables for the freezer
Beginner Vegetables, grains and beans
Briefly boiling vegetables, chilling them in ice water, and freezing them flat so they keep color and flavor for months.
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How do you do it?
- Use about a gallon of boiling water per pound of vegetables so it returns to a boil within a minute.
- Blanch for the right time: about 2 minutes for leafy greens, 3 minutes for green beans or broccoli florets; start timing at the boil.
- Plunge into ice water for the same amount of time, then drain and dry thoroughly.
- Freeze in a single layer on a tray, then bag with the air pressed out; use within 8-12 months.
Why does it work?
Vegetables keep enzymes that slowly break down color, flavor, texture and vitamins, even in the freezer. A short blanch heats them enough to switch those enzymes off and drives air from the tissue, brightening green color. Ice water stops the cooking so they don't soften. Drying and tray-freezing keep ice crystals and clumping to a minimum.
What are the common mistakes?
- Skipping the blanch — vegetables turn dull, off-tasting and woody within months.
- Over-blanching — soft, mushy vegetables after thawing.
- Freezing them wet — they clump into a solid block and get freezer burn.
Still stuck? Watch someone do it on YouTube.
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