How To Freeze Diced Onions


Let’s see how to freeze diced onions efficiently and practically. Many recipes use onion.

This technique allows us to store the onions in the freezer and use them when necessary.

Besides, we will save time in the kitchen because we will not have to chop any onion every time.

Tools & Equipment For Freezing Food

These are my tried and tested tools and equipment for freezing food.

Whether it’s fresh fruits or completely prepared meals these tools will make the process easier, and the food last longer and taste better!

Containers – We opt for glass containers as they are better for the environment, much higher quality and don’t stain like plastic, however they are an investment.

So if you’re short on money buy high-quality plastic containers in the meantime.

Just be sure that you buy your containers in a range of sizes as you’ll be using them to freeze and store a range of different foods.

Ziplock Bags – Invest in quality freezer bags and they’ll help keep out air, prevent frost and keep your food fresh for longer.

The majority of the high-quality ziplock bags come with a small area for you to write information about the food (i.e. what it is, when it was frozen and defrosting instructions) on the bag.

Ice Cube Trays – Ice cube trays can help you freeze more than just water. Instead, we use them for freezing small portions of food such as egg whites, tomato sauce, pesto etc.

Simply add the food to the tray, freeze and once frozen pop the food out and into a ziplock bag, then you can simply take one or two portions of food out and defrost as needed.

Foil Baking Containers – We use foil baking containers when we’re batch cooking frozen meals.

They are affordable, durable and come in a variety of sizes allowing you to portion out or put everything in one large container to be cooked at a later date.

If all that wasn’t enough, the majority of meals are safe to be cooked in the oven with the foil container. This reduces the amount of hassle, time and washing up you’ll have to do – winner!

How To Freeze Diced Onions

The preparation is straightforward. In short, get rid of the hardest outer layers. Then, freeze them.

Usually, prep time takes about 10 minutes plus freezing time. The use of a cutting board for the first part is highly recommendable.

With a sharp knife, cut the two ends of the onion and remove the peel.

Divide the onion in half, and place the cut part on the cutting board.

Cut the onion into slices. Rotate it 90 degrees and slice it again in the other direction (perpendicular to the previous one) to obtain many small cubes. Repeat this step for every onion you have.

At this point, wrap the diced onions in a cloth and squeeze it with energy to make them lose the vegetation water. Spread it on a dry cloth, and let the air dry it further for half an hour.

Then, arrange the diced onions in small containers suitable for storage in the freezer, or freeze the chopped onion in ice molds.

If you use this last technique, be careful, and cover them with plastic wrap or put them in a freezer bag in order not to propagate the onion smell throughout the freezer.

Freeze the onions in bags suitable for freezing, and write the date on it. Or you can prepare single portions using plastic cups.

You can also put the onions in a mixer before storing them in the containers. Diced onions can last up to 6 months!

How To Defrost Diced Onions

Once you removed the desired amount, you can defrost the diced onions by putting them in the fridge for 12-24 hours, so that there is no sudden temperature change.

Pay attention to the thawing liquid: put the food on saucers or inside containers. To prevent odour, use a sealed container.

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The onion is rich in minerals and vitamins (especially vitamin C). It also contains a healthy amount of calcium, phosphorus, iodine, and fluorine.

In order not to lose these nutrients during defrosting, I advise you not to thaw and freeze one more time the same onion.

Making single portions is useful for picking up only the parts you need.

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