This is why grandma always puts cloves in an onion

Why People Stick Cloves into an Onion: An Old French Trick with Modern Uses

Pairing cloves with an onion might sound unusual, but this simple method comes from age‑old French household traditions. Today, it’s making a comeback thanks to its many practical benefits—from repelling insects to adding flavor in the kitchen.

Below are the main reasons why putting cloves in an onion is such a clever, multi‑purpose trick.

1. A Natural Insect and Pest Repellent

When you press cloves into an onion, you create a surprisingly effective natural insect repellent.

Cloves are rich in eugenol, a powerful aromatic compound with a strong, spicy scent. This smell interferes with the sense of smell of flies, mosquitoes, moths, and some other household pests. Combined with the distinct odor of onion, the result is an even more unpleasant scent for insects, encouraging them to stay away.

Instead of using chemical sprays, this simple clove‑studded onion can act as a more eco‑friendly alternative for certain types of pests.

How to use it:

• Take a whole onion.
• Stick several whole cloves into it, spacing them out.
• Place the onion in areas where insects are a problem, such as:
  • Near the kitchen window
  • In the pantry
  • Close to fruit bowls or trash cans

This can help keep pests at bay while reducing your reliance on toxic insecticides.

2. Helping Onions Last Longer

Onions can spoil quickly in humid conditions, developing mold or rot. Cloves offer a simple way to slow this process.

Cloves have well‑known antimicrobial and antifungal properties. When you insert a few cloves into an onion, they create a kind of natural protective barrier that can inhibit the growth of mold and certain bacteria on the surface.

While it won’t preserve onions forever, this trick may help extend their shelf life, especially if you store them in a cool, dry, well‑ventilated place.

3. A Natural Home Deodorizer

The fragrance created by cloves and onion together is unusual—spicy from the clove and sharp from the onion—but it can be surprisingly effective at masking stubborn smells.

This clove‑onion combo has been used in:

• Closets with musty odors
• Kitchens with poor ventilation
• Rooms where cooking smells tend to linger

In this case, the onion acts as a base or “carrier,” slowly releasing the warm, aromatic scent of the cloves over time.

A historical note:
In the past, people would place clove‑studded onions (and sometimes other aromatics) in large banquet halls during feasts. They used them as natural air fresheners to help neutralize heavy food smells.

4. Flavoring Soups, Broths, and Sauces

Beyond household uses, sticking cloves into an onion also has a culinary purpose.

In many traditional recipes, especially for stocks and sauces, a clove‑studded onion is simmered whole to gently infuse the dish with flavor. The cloves provide a warm, subtle spice, while the onion contributes sweetness and depth without either becoming too dominant.

How to use in cooking:

1. Peel a whole onion.
2. Insert several cloves into the onion, pushing them through the outer layers.
3. Add the onion directly to:
   • Soups
   • Broths
   • Stews
   • Sauces
4. Remove the onion before serving.

This method allows you to extract flavor cleanly and easily, with no need to hunt for individual cloves later.

5. A Fun Decorative and Educational Project

A clove‑studded onion isn’t just practical—it can also be visually interesting and serve as a simple craft or learning tool.

For those who enjoy natural decoration, an onion covered with cloves can be:

• Displayed in a rustic kitchen
• Used as part of a nature‑inspired centerpiece
• Incorporated into holiday or seasonal decor

With children, it becomes a hands‑on activity that can spark curiosity. As they push the cloves into the onion, you can introduce topics like:

• Natural remedies and traditional practices
• How scents affect insects and people
• The idea of using plants instead of synthetic chemicals

It’s an easy, low‑cost way to connect kids to everyday natural ingredients and their uses.

In Summary

Sticking cloves into an onion is a simple, time‑tested practice that combines tradition, practicality, and sustainability. This small trick can:

• Help deter certain insects and pests
• Support better onion storage in damp conditions
• Act as a natural home deodorizer
• Add gentle, aromatic flavor to soups and sauces
• Serve as a charming decorative and educational project

Whether you want to reduce chemical use in your home, experiment with traditional methods, or simply add more flavor to your cooking, the clove‑and‑onion trick is an easy habit worth trying in your daily life.