Preserve Onions for Up to Two Years with This Simple Method!

Onions are a staple ingredient that provide a distinct, rich flavor to everything from crisp salads to hearty stews. But the question of how to store them correctly to keep them from spoiling before we can utilize them all frequently arises.

Stop worrying! Here’s my top tip for preserving onions’ flavor and freshness for up to two years. You can learn how to do it by following this detailed guide:

How to Best Preserve Onions for Long-Term Storage

First things first, make sure you have 4 kg or more of red onions on hand (you may substitute white onions if you’d like). Better yet if you have additional onions at home! For large quantities, this approach works exceptionally well.

Step-by-Step Guidelines

1. Preparing the Onions:

  • Cut the Onions: Start by roughly slicing the onions. This helps facilitate the drying process.
  • Salt the Onions: Put some onions in a masher and add half a teaspoon of rock salt or sea salt (approximately 5 grams). Crush the mixture until the onions are pureed to a consistent consistency.

2. Drying the Onions:

  • Spread the Puree: Spread the onion puree onto oiled parchment paper. Ensure the puree is evenly distributed for uniform drying.
  • Dry the Onions: Allow the onions to dry thoroughly. You can use a food dehydrator set to a low temperature or an oven set to its lowest setting. Alternatively, you can dry them in a well-ventilated area if the climate permits. This process may take several hours to a few days, depending on the drying method and the environment.

3. Storing the Onions:

  • Crumble the Dried Onions: Once the onions are completely dried, crumble them into small pieces. You can use a mortar and pestle or a food processor for this step.
  • Store in Airtight Containers: Transfer the crumbled onions to airtight containers. Glass jars with tight-fitting lids or vacuum-sealed bags work best to maintain their freshness.
  • Label and Date: Don’t forget to label the containers with the date of preparation to keep track of their freshness.

Tips for Optimal Storage

  • Cool, Dark Place: Store the containers in a cool, dark place to maximize their shelf life. A pantry or a cupboard away from direct sunlight is ideal.
  • Avoid Moisture: Ensure the storage area is dry and free from excess humidity. Moisture can cause the onions to spoil faster.
  • Check Regularly: Periodically check the containers for any signs of moisture or spoilage. If you notice any, discard the affected onions immediately to prevent contamination.

Why This Method Works

Preserves Flavor: The drying process concentrates the onions’ natural flavors, enhancing their taste when used in recipes.

Long Shelf Life: Properly dried and stored onions can last up to two years, ensuring you always have onions on hand for your culinary needs.

Convenient: This method reduces waste and saves you time. You won’t need to frequently buy fresh onions, and you’ll have a convenient, ready-to-use ingredient at your fingertips.


Storing onions correctly can dramatically extend their shelf life, preserving their rich flavor and nutritional value. By following this method, you can keep your onions fresh for up to two years, ensuring you always have this essential ingredient on hand. Try this storage tip and experience the convenience and flavor of perfectly preserved onions in your kitchen.

As culinary expert Barbara O’Neill often emphasizes, “Proper storage techniques not only save money but also preserve the nutritional integrity and flavor of your ingredients, making every meal healthier and more enjoyable.”

Refreshing Watermelon, Ginger, and Lime Juice: A Healthful Drink

Sweet Alert: 10 Signs Your Body Might Be Craving a Sugar Fix