What does the term “marinate” mean in cooking? Explanation

Marinating is a culinary technique that involves submerging food, raw or cooked, in an aromatic liquid for a specific period of time, with the aim of modifying its flavor, texture, and (at least historically) its shelf life. To marinate literally means to leave the food to soak in a liquid solution over time, resulting in a slow, superficial yet profound sensory transformation.

The term "marinate" derives from "marine," meaning seawater. This is no coincidence. Originally, even before the practice was widely known, food was submerged in saline liquids to slow its spoilage. Thus, marinating began as a survival technique rather than a pleasure, in a time when food preservation was a major daily challenge. Only later did this process acquire culinary significance, becoming a tool for enhancing flavor.

Marinating is based on 3 fundamental elements

Marinating doesn't simply mean "seasoning" or, more importantly, "cooking." Marinating is a dynamic process involving an exchange between the food and the surrounding liquid. From a culinary perspective, it serves to flavor, aromatize, and, in some cases, tenderize the raw material. From a scientific perspective, it's a complex phenomenon involving chemical, physical, and osmotic reactions, all limited to the food's surface layers, but sufficient to alter its final perception.

At the heart of every marinade lies the balance between three fundamental elements: acid, fat, and aromatics. Acids, such as vinegar, citrus juice, wine, or fermented dairy products, act on proteins, inducing a process called denaturation. Simply put, the proteins lose their original structure, partially unfolding and changing their consistency. It's the same principle that governs cooking, but much slower and more superficial. For this reason, some marinated foods, like lemon fish, appear cooked even though they haven't been heated.

Fats, usually oils, play a less obvious but equally crucial role. They act as aroma carriers, since many of the molecules responsible for the aroma of herbs and spices are fat-soluble. Without a fat component, most aromas would remain inert. Oil also creates a barrier that limits food dehydration and contributes to a smoother texture.

Seasonings complement the marinade and define its identity: they are what transform the soaked ingredients into an authentic dish. Herbs, spices, garlic, onion, seeds, and peels speak of regions, seasons, and traditions. A marinade is never neutral: it is always a culinary language, recognizable and deeply rooted in the context in which it originated. Brine marinades, saor marinades, salmoriglio marinades, Asian soy-based marinades, or Middle Eastern marinades with yogurt and spices are not mere technical variations, but expressions of a geography of taste.

Marinating from a scientific point of view

From a scientific perspective, it's important to clarify a widespread misconception. Marinating does not mean disinfecting. Acidic ingredients do not eliminate bacteria or parasites, nor do they make raw food safe. Marinating changes the color, texture, and aroma, but it does not replace cooking or refrigeration, which remain essential for food safety. The "cooking" effect observed, especially in fish (though to a lesser extent in meat), is simply a structural transformation of the surface proteins.

Time is another key factor in marinating. Each food reacts differently, and there is no universal marinating time. Firm meats benefit from prolonged immersion, while delicate ingredients risk losing their texture if left too long in an acidic environment. Temperature is also crucial: marinating should always be done in cold water, as liquid is not a protective medium but a potentially favorable environment for microbial growth.

There is also a liquid-free marinade, called "dry marinade," based on the combined action of salt and sugar. In this case, the process is governed by osmosis: the crystals attract the water contained in the tissues, concentrating the flavors and modifying the texture. This ancient technique, now experiencing a resurgence thanks to the rediscovery of Nordic and fermented preparations, demonstrates that marinating doesn't necessarily imply immersion, but rather transformation.

In the kitchen, marinating is one of the oldest and most universal practices. It's an act of waiting, of trusting in time, of dialogue between humankind and raw ingredients. Marinating means intervening without forcing, guiding change without dominating it. Perhaps that's precisely why, despite modern techniques and scientific precision, marinating retains something profoundly archaic: a knowledge that doesn't accelerate, but rather allows things to take their course.