How to Store Hazelnuts

Storing hazelnuts properly is key to maintaining their flavor and longevity.

Whether you’ve gathered a bounty from a home orchard or purchased in bulk, knowing how to keep hazelnuts fresh ensures they are ready for snacking or cooking when you are.

Hazelnuts boast a naturally long shelf-life, but this can be maximized through correct storage techniques.

Hazelnuts in airtight container on a cool, dry shelf. Label with date. Keep away from direct sunlight and moisture

At their best, hazelnuts offer a sweet and rich taste that can enhance numerous dishes.

To preserve these qualities, you should consider factors such as freshness, whether to remove shells, and the choice of storage containers.

For extended preservation, methods like refrigeration or freezing are effective in keeping your hazelnuts in prime condition.

Monitoring your stored hazelnuts for any signs of spoilage is important.

Stale or rancid nuts not only taste unpleasant but may also affect your recipes and dishes negatively.

Implementing a few straightforward storage steps will ensure that your hazelnuts stay as fresh and flavorful as the day they were harvested or purchased.

Hazelnut Basics

A glass jar filled with hazelnuts sits on a wooden shelf, surrounded by a few loose nuts. The label "Hazelnut Basics" is prominently displayed on the jar

In this section, you’ll learn about the nutritional value of hazelnuts and how to identify their freshness, ensuring you can appreciate their taste while reaping their health benefits.

Nutritional Value and Benefits

Hazelnuts are a rich source of unsaturated fat, which is beneficial for your heart health.

They are also packed with natural oils, vital for maintaining quality and freshness. Here’s a brief overview of their nutritional content:

  • Calories: 178 per ounce
  • Fat: 17 grams (primarily unsaturated)
  • Protein: 4.2 grams
  • Dietary Fiber: 2.7 grams

The high content of unsaturated fats in hazelnuts supports cardiovascular health, while their protein and fiber content promote satiety, helping to manage weight.

Distinguishing Fresh Hazelnuts from Spoiled Ones

Freshness and quality are key when consuming hazelnuts.

Fresh hazelnuts should be plump and heavy for their size, indicating they are ripe and full of natural oils.

The appearance of the shell should be glossy and free from cracks or holes. When you shake a hazelnut, it should not rattle, as this suggests the kernel has shrunk and may not be fresh.

The smell of hazelnuts can be a strong indicator of their condition.

They should have a sweet, nutty aroma. A sour or bitter smell is a sign of rancidity.

This rancidity occurs when the natural oils in hazelnuts break down, usually due to exposure to air, heat, or light.

Similarly, the taste of spoiled hazelnuts will be unpleasantly bitter. The texture should be crisp; if the nuts feel rubbery or soft, they are past their prime.

By recognizing these signs of spoilage, you can ensure you’re enjoying hazelnuts that are both delicious and nutritious.

Hazelnut shelf life can be extended if stored properly, keeping them from becoming rancid and preserving their desirable taste and texture.

Initial Storage Preparation

When storing hazelnuts, the process begins with proper harvesting and preparation. Ensuring that the nuts are ripe, dry, and stored in their shells can vastly extend their shelf life.

Harvesting and Selecting Hazelnuts

You should harvest hazelnuts as soon as they ripen which is when the husks begin to crack. This typically occurs in late summer or early fall.

  • Check for ripeness: Hazelnuts are ripe when the husk splits and the shell is brown.
  • Remove debris: After harvesting, separate the nuts from leaves and twigs.
  • Inspect for quality: Choose in-shell hazelnuts that are free from cracks and holes to prevent premature spoilage.

Cleaning and Drying

Once harvested, you must clean and dry the hazelnuts properly to prevent mold and decay. Even a small amount of moisture can spoil your produce.

  1. Wash gently: Rinse the hazelnuts briefly to remove dirt; avoid soaking as this introduces excess moisture.
  2. Dry thoroughly: Spread the hazelnuts in a single layer on a clean, dry surface. Allow them to dry in a well-ventilated area away from direct sunlight.

Natural drying can take several days. Check regularly to ensure they’re drying consistently.

Alternatively, you can use a food dehydrator for a more controlled drying process.

Short-Term Storage

Hazelnuts in a sealed container on a cool, dry shelf. Label with date. Avoid direct sunlight or moisture

When storing hazelnuts for short-term use, it’s essential to protect them from air and moisture to prevent them from going stale or developing mold.

Choose between room temperature and refrigerated options depending on your expected usage timeline.

Room Temperature Options

For a shelf life of up to a month, you can store your hazelnuts in your pantry or kitchen at room temperature. Ensure they are placed in a:

  • Sealed bag: A resealable plastic bag helps maintain freshness.
  • Airtight container: A glass or plastic container with a secure lid is ideal.

It’s important that your storage option is well-ventilated and away from direct sunlight.

Regularly check for signs of spoilage, such as mold or an off smell, and discard any compromised nuts.

Refrigerating for Freshness

If you need to extend the freshness of your hazelnuts beyond a month, consider refrigeration.

Store them in your fridge using:

  • Airtight containers: A must to protect against moisture and other food odors.
  • Sealed bags: If an airtight container isn’t available, a zip-top plastic bag will suffice.

Remember to label your storage container or bag with the date to keep track of how long the hazelnuts have been stored.

This chilled environment helps retard the process of the nuts becoming stale, offering a longer period of freshness.

Long-Term Storage Solutions

When it comes to maintaining the freshness and flavor of hazelnuts over an extended period, freezing presents the most effective method. Proper techniques and storage practices are critical in preserving their quality.

Freezing Techniques

To successfully freeze hazelnuts, begin by shelling them to remove any debris or residue.

Once you have your clean hazelnuts, place them in a freezer bag or vacuum-sealed container to minimize air exposure.

Vacuum-sealing is particularly effective as it removes air, preventing freezer burn and preserving flavor.

  • Steps for Freezing Hazelnuts:
    1. Shell the hazelnuts, ensuring they are clean.
    2. Place hazelnuts in a freezer bag or use a vacuum sealer.
    3. Expel as much air as possible before sealing.
    4. Label the bag with the current date.

Optimal Freezer Storage Practices

For optimal preservation, store your sealed hazelnuts in the freezer at temperatures at or below -18°C (-0.4°F).

It’s important to label your storage container with the date to track how long the nuts have been frozen, allowing you to manage their freshness effectively.

  • Best Practices for Freezer Storage:
    • Maintain a consistent temperature.
    • Use a reliable airtight container, such as a glass jar or resealable plastic bag.
    • Keep track of storage durations: hazelnuts can be kept frozen for up to a year.
    • Avoid placing the hazelnuts near items with strong odors to prevent flavor transfer.

Hazelnut Usage in Cuisine

Hazelnuts stored in airtight container in a cool, dry place. Some cracked open to reveal the nut inside

Hazelnuts are a distinctive ingredient, adding a rich, nutty flavor to dishes ranging from sweet to savory. They can be simply sprinkled atop a dish or used as a core component in various culinary creations.

Roasting Hazelnuts for Enhanced Flavor


  1. Preheat your oven to 350°F (175°C).
  2. Arrange hazelnuts in a single layer on a baking sheet.
  3. Roast for 10-15 minutes, shaking the pan halfway through for even browning.


  • Roasting deepens their flavor.
  • Enhances the nutty aroma.
  • Improves crunchiness.

Roasted hazelnuts can be a game-changer in your recipes, intensifying flavors and adding crunch.

For example, add them to your salad for an unexpected twist or blend into nut butter for a richer spread.

Incorporating Hazelnuts into Recipes

Sweets & Desserts:

  • Crush and sprinkle them over ice cream or into chocolate-based desserts.
  • Hazelnut flour can be a key ingredient in baked goods for a subtle, nutty undertone.

Savory Dishes:

  • Mix chopped hazelnuts into pasta sauces or as a crunchy topping for your toast.
  • Incorporate them into your homemade granola or trail mix for a nutritious boost.

Special Considerations

Hazelnuts stored in a cool, dry place in airtight containers. Label with date and use within 1 year. Avoid exposure to light, heat, and moisture

When storing hazelnuts, it’s paramount to recognize signs of spoilage and maintain an organized stock to ensure freshness.

Your vigilance will preserve both the rich taste and valuable nutrients.

Identifying and Preventing Hazelnut Spoilage

Hazelnuts can go bad when exposed to moisture and air, leading to rancidity and a bitter taste.

Spoilage is often signaled by:

  • Aroma: A sour or paint-like smell indicates that nuts have gone rancid.
  • Appearance: Look for visible mold or an oily sheen. Skins that are unusually dark may also denote spoilage.

Oxidation is the primary cause of spoilage, where nuts become rancid due to prolonged exposure to air.

Prevent this by:

  1. Storage: Always keep hazelnuts in an airtight container—glass is preferable—with minimal air space.
  2. Temperature: Store in a cool, dark place. The refrigerator is ideal for up to six months; the freezer can extend their shelf life to a year.
  3. Moisture: Avoid places with high humidity to prevent the nuts from absorbing moisture, which could lead to mold growth.

Inspect your hazelnuts regularly for any signs of spoilage like changes in texture, taste, or smell.

Best Practices for Labeling and Rotating Stock

Labeling is key in tracking the freshness of your hazelnuts.

Every container should have a label that includes:

  • Expiration Date: Clearly mark when the nuts were purchased and their expected shelf life.
  • Storage Date: Indicate the date on which you stored the nuts in your chosen location.

To ensure that you’re using the freshest stock:

  • Utilize a “first in, first out” approach—use the oldest stock first.
  • Regularly rotate your stock, bringing older containers to the front.

Organized and precise labeling, along with diligent rotation, will help make the most of hazelnuts’ shelf life while retaining their fiber, nutrients, and flavor.

Comparative Storage Methods

When storing hazelnuts, it’s critical to consider whether they are shelled or unshelled, as well as recognizing the different storage needs compared to other nut varieties.

Shelled vs. Unshelled Hazelnuts

Shelled Hazelnuts

  • Shelf Life: Shelled hazelnuts, when stored in an airtight container, can last for several months in the pantry and even longer in the refrigerator or freezer.
  • Conditions: Ensure the container is moisture-free to prevent the nuts from becoming rancid.

Unshelled Hazelnuts

  • Shelf Life: Unshelled hazelnuts typically have a longer shelf life compared to their shelled counterparts due to the natural protection of the shell.
  • Conditions: Store them in a cool, dry place away from direct sunlight to maintain their longevity.

Alternative Nuts and Their Storage

Walnuts and Almonds

  • Walnuts: Store in the refrigerator for up to 6 months or freeze for up to a year. Keep them in airtight containers to protect against moisture and odors.
  • Almonds: Store in a cool, dark, and dry place, such as your pantry for up to a year. For prolonged storage, refrigeration or freezing can extend their freshness.

Storage Conditions for Nuts

  • Temperature: The ideal range is below 70°F (21°C) to slow down the aging process.
  • Humidity: Aim for a humidity level that’s lower than 65% to prevent mold growth.

Avoiding Common Storage Mistakes

When storing hazelnuts, ensuring they are not compromised by environmental factors is crucial for maintaining their freshness and flavor. Pay special attention to light and heat exposure as well as air circulation.

Protection from Light and Heat

Avoid storing hazelnuts in areas that receive direct sunlight or are near sources of heat, such as ovens or stovetops.

Excessive light and heat can cause the oils in hazelnuts to go rancid, negatively affecting taste and leading to spoilage.

Recommended storage practices:

  • Store hazelnuts in a cool, dark place away from light.
  • Maintain a steady temperature, ideally around room temperature or slightly cooler.

Ensuring Adequate Air Circulation

Proper air circulation is essential to prevent moisture build-up, which can cause mold growth and lead to the nuts cracking.

However, too much air can dry out the nuts or introduce unwanted odors.

Tips for optimal air circulation:

  • Use perforated bags or containers with air circulation if keeping at room temperature.
  • Ensure containers are airtight if storing in a refrigerator to avoid absorbing other food odors.
  • Avoid overfilling containers, allowing hazelnuts some space to “breathe”.

Frequently Asked Questions

Hazelnuts in airtight container on a pantry shelf, away from sunlight and moisture. Label with date and use-by date

In this section, you’ll find concise answers to common inquiries about storing hazelnuts, ensuring their longevity and quality.

What is the best method to store shelled hazelnuts for long-term preservation?

For long-term storage, place your shelled hazelnuts in an airtight container and keep them in the freezer. This method will prevent spoilage and maintain freshness for an extended period.

What steps should be taken to prepare and store hazelnuts for the winter months?

To prepare hazelnuts for winter storage, ensure they are completely dry to prevent mold. Store them in a sealed container in a cool, dry place away from direct sunlight, which could compromise their quality.

Can shelled or in-shell hazelnuts be effectively frozen for extended periods?

Yes, both shelled and in-shell hazelnuts can be frozen. For best results, keep them in an airtight container or a resealable plastic bag. Label the bag with the date and store them at temperatures around -18°C (-0.4°F) for optimal preservation.

What is the optimal way to roast and store hazelnuts for freshness?

Roast hazelnuts at 300°F for 10 minutes for maximum flavor, and store them in an airtight container in the freezer. This prevents the oils in the nuts from becoming rancid and maintains their crunchiness.

How can one determine if their stored hazelnuts have become spoiled or rancid?

Check for signs of mold, an unpleasant odor, or a bitter taste. These indicators mean the hazelnuts have gone bad and should not be consumed.

What is the recommended storage duration for hazelnuts kept in their shells?

Hazelnuts in their shells can be stored at room temperature in a cool, dry place for up to several months.

To extend their life up to a year, consider refrigerating or freezing them in properly sealed containers.

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Cassie brings decades of experience to the Kitchen Community. She is a noted chef and avid gardener. Her new book "Healthy Eating Through the Garden" will be released shortly. When not writing or speaking about food and gardens Cassie can be found puttering around farmer's markets and greenhouses looking for the next great idea.
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