Buzz
Frozen vegetables, much like pot roast and Justin Bieber, are in need of a reputation boost. They’ve unfairly received a negative image, yet freezing your vegetables is an affordable and convenient way to enjoy your favorite produce year-round. In fact, freezing can help retain nutrients even better than fresh options in some cases. While the process may be a bit more involved than freezing fruit, it’s still relatively simple.
Why Should You Freeze Vegetables?
While fresh vegetables are unbeatable in terms of flavor, freezing them is the most straightforward method to preserve their full nutritional value without the complexities of canning. This method is especially beneficial when you have an abundance of seasonal produce, like peas in spring, corn and zucchini in summer, or carrots in winter. Most vegetables are briefly blanched before freezing, which reduces their cooking time when used later. Keep frozen broccoli on hand for stir-frys, toss peas into risotto, or add carrots to hearty stews. Personally, I enjoy adding wilted collard greens to a pot of bacon for a classic Southern dish. Or, for a quick meal, gently steam any vegetable for a nutritious side dish.
A Simple Guide to Freezing Almost Any Vegetable
The key distinction between freezing fruits and vegetables lies in the process of blanching, or briefly boiling. Blanching halts enzyme activity that can lead to flavor, color, or texture deterioration. It also enhances the color of your veggies (notice the brilliant green of peas!), cleans the surface, and slows down nutrient loss. After blanching, it’s essential to cool the vegetables quickly to stop the cooking process.
A few additional tips to keep in mind: Make sure your freezer is set to 0ºF or lower. Just like with frozen fruit, moisture and air are the biggest enemies of your frozen vegetables, so keep them dry and sealed as best as you can!
Choose young, tender, and crisp vegetables at their peak. The sooner they’re frozen after harvest, the better they’ll taste. If you have an abundance of peas that you know won’t be eaten fresh, it’s better to freeze them quickly than to let them over-ripen.
Clean them thoroughly.
Blanch or briefly cook the vegetables in boiling water (see specific times below for each vegetable).
Cool your vegetables quickly by transferring them from the boiling water into an ice water bath until they’ve cooled down. I recommend using a colander over the ice bath (see below).
Dry your vegetables as much as possible. This step is crucial—if you skip it, your frozen veggies could end up like this:
Spread the vegetables on a sheet tray until they’re fully frozen, then place them in a heavy-duty freezer bag. Once packed, wipe the top of the bag clean and seal it tightly, ensuring to “burp” the bag and remove excess air. This helps prevent freezer burn and keeps your food from drying out. Don’t forget to label the bags with the date and the type of vegetable.
Your vegetables are ready! To use them, defrost them in the fridge or under cool running water. Aim to use them within 6 months to a year to avoid freezer odors affecting their taste.
Blanching Times and Other Tips to Keep in Mind
The step-by-step guide provided works for almost any vegetable, but some varieties don’t freeze well. Vegetables with high water content—like cabbage, celery, cucumbers, endive, radishes, and lettuce—won’t hold up in the freezer and will become limp and soggy when thawed. Other vegetables, like onions, may have their flavor altered; green bell peppers, for example, may turn bitter. Stick to these tips and cooking times to ensure success.
Asparagus: Cut into your desired length and blanch for 2-4 minutes.
Avocado: Freezing avocados the same way as other vegetables will result in a mushy texture. To properly freeze, wash, scoop out the flesh, and purée it with a bit of lemon juice to prevent browning.
Bell peppers: Avoid freezing bell peppers, green or otherwise, as they change flavor during freezing.
Broccoli: Peel and trim the stalks, cut the florets off, and blanch for 3 minutes.
Brussels Sprouts: Wash thoroughly and blanch for 3-5 minutes.
Cabbage: Avoid freezing cabbage.
Carrots: Peel, slice, or dice and blanch for 3 minutes. For baby carrots, blanch them whole for 5 minutes.
Cauliflower: Soak in a saltwater solution for 30 minutes; blanch in salted boiling water for 1-3 minutes.
Celery: Avoid freezing celery.
Corn (kernels): Husk and de-silk, blanch for 4-5 minutes, and cut from the cob once cool.
Corn (cob): Blanch for 6-9 minutes.
Cucumbers: Do not freeze cucumbers.
Eggplant: Wash, slice, and cube; blanch for 4 minutes. Dry thoroughly.
Endive: Do not freeze endive.
Green beans: Line up the stem ends, slice them off, cut into bite-sized pieces, and blanch for 2-4 minutes depending on the thickness of the beans.
Herbs: Do not freeze delicate, soft herbs like basil, chives, or parsley. Hardier herbs like rosemary, thyme, and oregano can be frozen by washing, drying, chopping, and storing in olive oil. Freeze in ice cube trays before transferring to zip-locked bags and labeling.
Jalapeños: Wash and blanch whole for 2-3 minutes, then place them in a sealed bag.
Leafy greens like kale, chard, and collards: Wash well, remove tough stems and leaves, and blanch for 2-3 minutes.
Lettuce and other salad greens: Do not freeze lettuce.
Lima beans or other beans in pods: Shell, sort, wash, and blanch for 2-4 minutes.
Mushrooms: Clean with a brush and blanch for 3-5 minutes.
Okra: Trim stems but do not break pods. Blanch for 3-4 minutes.
Onions: Avoid freezing onions, as they change flavor during freezing.
Potatoes: Potatoes don’t freeze well because they become mealy.
Radishes: Do not freeze radishes.
Snow peas: Wash, remove strings and stems, and blanch for 1-3 minutes.
Spinach: Trim and blanch for 2 minutes. Squeeze out as much water as possible before freezing.
Sprouts: Do not freeze sprouts.
String beans: Cut, slice, or leave them whole; blanch for 3-4 minutes.
Summer squash/zucchini: Wash, cut into slices, and blanch for 3 minutes.
Tomatoes: Tomatoes don’t freeze well due to flavor loss and mealy texture. If you must freeze, peel and quarter them, cook for 10-20 minutes until tender, then cool in cold water before packing them into containers, leaving an inch of headspace. Seal and freeze.
Turnips and parsnips: Wash, slice, and blanch for 3 minutes.
Watercress: Do not freeze watercress.
Are Pre-Frozen Vegetables Ever Worth It?
If you don’t have a surplus of vegetables to freeze or are pressed for time, store-bought frozen vegetables can be a good alternative. Frozen spinach is especially helpful when making recipes like spanakopita that require large amounts of spinach (buying fresh would require numerous bags). Vegetables like okra, which are seasonal in my area, are great for stews, and peas, often used in risottos and fried rice, are another good option. However, when possible, I prefer freezing my own peas as they have a better texture after freezing.
As with freezing fruit, you control factors like cut and size (see the broccoli example above). But the real benefit is that there are many vegetables, such as asparagus, cauliflower, and shiitake mushrooms, that you simply can’t find in the frozen food section of your supermarket, yet you can freeze them at home yourself.
If you’re still unsure about freezing asparagus, don’t wait too long. Your freezer is most energy-efficient when it’s full, after all.
Images courtesy of Steven Depolo and The Kitchn.
