How to Blanch Vegetables Before Freezing

How to Blanch VegetablesBlanching your veg is vital if you are going to successfully freeze them. It helps preserve them better, keeps in the nutrients and stop them going limp.

Although the process is really simple and fairly quick to do you need to know how to blanch your vegetables before your freeze them and how long each type takes to get the best results.

Boing them is the quickest and easiest and most successful method to use.  Here we cover the basics of blanching from boiling them to cooking them then getting them in that freezer.  There is also a list of blanching times you can use.

You don’t really need any specialist equipment although a blanching pan will help.

Why Blanch Vegetables?

When I first started growing vegetables I wanted to grow enough to use over a longer period so I decided to get a freezer and to freeze them. I asked other gardeners on the allotment what they did.  Many said they didn’t freeze as their veg came out soggy and limp.  Nearly always they had not blanched.  And although this added process takes time and effort the produce is then good for about a year in a good freezer.

So this is why you should blanch your vegetable when you intend to freeze them. You get better results and crisper veg. There is better retention of their original colour. And you keep more nutrients.  It also destroys and surface bacteria.

What Equipment Do You Need?

  • A Hob
  • A large saucepan for blanching
  • Blanching basket
  • A Colander for draining
  • Chopping board and knife
  • Another large saucepan or container for cold water
  • Flexible flat trays for freezing

You Also need

  • Vegetables
  • Boiling Water
  • Ice (optional)
  • Salt (optional)

 

16cm x 14cm Tinned Blanching Basket

How to Blanch and Freeze Your Vegetables

When I blanch vegetables I tend to have a lot of one sort and as I have lots at any one time and they have different times I would not generally mix them.

The best way to blanch vegetables for freezing is to use boiling water on the hob. For most things, it is basically the same just the timings are slightly different.  However, some things have a longer shelf life so may not need to be frozen. Some things are not as successful with freezing anyway so it might not be worth doing those.  It is a personal choice.

  1. Prepare your vegetables by washing and cleaning them and topping and tailing them. Once you have cut off the ends you can choose to blanch now. I prefer to slice up my beans so I can see that they are OK inside (I grow virtually organically so am more prone to pests than sprayed things). It’s up to you.
  2. Blanch in boiling water for the allotted time (see our chart). If you want to use salt you can, I don’t and have never had any problems however some say that also helps maintain the colour of your vegetables.
  3. Remove from the pan and plunge into icy cold water or place under cold running water until they are cold. This stops the vegetables from cooking further.
  4. Drain and shake off the excess water.
  5. Pat dry or leave to drain.
  6. If it is small veg like peas or beans or other cut up vegetables spread out on a tray. Ideally, you want a flexible tray as it will be easier to remove your vegetables from them once they are frozen.
  7. Place your tray into the freezer and allow your vegetables to freeze. (If you put them all together they will freeze into a group rather than individually).
  8. Once they have frozen you can place them into a suitable container or bag.

How Long Should You Blanch For?

Blanching itself doesn’t take long. However, the timing is vital or the blanching to work well.

The table shows all the blanching times. Although for me personally some have a good storage time so I might just keep them and use them as needed.

Vegetable Blanching Times
no Vegetable Blanching Time
1  Globe Artichoke  7-10 minutes
2 Asparagus  3 minutes
3 Aubergines  4 minutes
4 French beans  2 minutes
5 Borlotti Beans 2.5 minutes
6 Broad beans  3 minutes
7 runner beans 2-3 minutes
8 Beetroot  3 minutes
9 Broccoli  4 minutes
10 Brussel Sprouts  3 minutes
11 Cabbage  3 minutes
12 Carrots 3 minutes
13 Cauliflower 3 minutes
14 Celeriac 3 minutes
15 Kohlrabi While 3 minutes
16 Kohlrabi diced 1 minute
17 Marrows 2 minutes
18 Leeks  2 minutes
19 Peas – Green 90 seconds
20 Peas – in the Pod 90 seconds
21 Peppers – sweet not necessary to blanch
22 Potatoes – Irish (New) 3-5
23 Rutabagas 3 minutes
24 Soybeans – Green 5 minutes
25 spinach 2 minutes
26 Squash – Summer 3 minutes
27 Turnips 3 minutes

Why Blanching Your Veg in a Microwave Might not Work so Well

While you can blanch in the microwave one of the reasons you blanch is to stop any enzymes from working. Becuase cooking in the microwave is different this may not work if you blanch in this way.