For generations, cooks around the world have used a simple kitchen technique: sticking whole cloves into an onion. This old-fashioned method may look unusual, but it has several practical uses that explain why it has remained popular.

The most common reason is flavor. When an onion is studded with cloves and added to soups, stews, sauces, or broths, it slowly releases a warm, slightly sweet, and spicy aroma. The onion provides a rich savory base, while the cloves add a distinctive depth of flavor.

In French cooking, this technique is known as an “oignon piqué.” It is traditionally used in dishes such as creamy sauces and slow-cooked recipes, where the onion and cloves can infuse flavor without leaving pieces of spice throughout the meal. The onion can be removed easily once cooking is complete.

Beyond cooking, cloves and onions have long been valued in traditional practices because of their strong natural aromas. Their scent comes from compounds found in both ingredients, although claims about health benefits from simply combining them should be viewed carefully, as many traditional uses are not supported by strong scientific evidence.

The technique also reflects an older approach to cooking: using simple ingredients to create complex flavors. Before modern seasoning blends and convenience products, cooks relied on methods like this to make everyday meals more aromatic and memorable.

Today, sticking cloves into an onion remains a small but clever kitchen trick. It is inexpensive, easy to try, and shows how traditional cooking methods can continue to add character to modern recipes.