What are Freeze Dried Onions?

Freeze dried onions are onions that have undergone a specific process known as freeze drying or lyophilization. This process removes the moisture from the onions, preserving them and extending their shelf life significantly. Freeze dried onions come in various types, most notably freeze dried red onions and freeze dried green onions.

Freeze Dried Red Onions

Freeze dried red onions retain the same flavor and nutritional value as their fresh counterparts. They are excellent for use in salads, burgers, pizzas, and other dishes where a punch of onion flavor is desired.

Freeze Dried Green Onions

Freeze dried green onions, also known as scallions, are a popular garnish and ingredient in numerous recipes. The freeze drying process maintains their vibrant green color and unique flavor.

The Freeze Drying Process

What is Freeze Drying?

Freeze drying is a preservation process that involves freezing the food and then reducing the surrounding pressure to allow the frozen water in the food to sublimate directly from the solid phase to the gas phase. It leaves the food's structure and nutritional content intact.

How to Freeze Dry Onions

Freeze drying onions at home can be done with a freeze dryer. The onions are sliced, placed in the freeze dryer, and the machine does the rest. The process can take up to 24 hours, depending on the machine and the quantity of onions.

The Benefits of Freeze Drying Onions

Preservation of Nutrients

One of the significant benefits of freeze drying onions is that the process preserves most of the nutrients, including vitamins, minerals, and antioxidants.

Long Shelf Life

Freeze dried onions have a long shelf life, often up to 25 years or more when stored properly. They can be a great addition to your pantry or emergency food supply.


Freeze dried onions are lightweight, easy to store, and quick to rehydrate. They provide the taste and nutritional benefits of fresh onions without the hassle of peeling, chopping, and crying.

Applications of Freeze Dried Onions

Culinary Uses

Freeze dried onions can be used in a variety of dishes, including soups, stews, sauces, and casseroles. They rehydrate quickly and bring a depth of flavor to your meals.

Emergency FoodStorage

Given their long shelf life, freeze dried onions are perfect for emergency food storage. They can be rehydrated quickly and used in a variety of dishes, providing essential nutrients during a crisis.

Buying Freeze Dried Onions

Where to Buy

Freeze dried onions can be found in various places including grocery stores, health food stores, and online. It's always a good idea to compare prices and read reviews before purchasing.

What to Look For

When buying freeze dried onions, look for products with no additives or preservatives. The ingredient list should only include onions. Also, check the packaging for an airtight seal to ensure freshness and longevity.

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