Vodka and soju enhance flavor

In many situations, vodka and soju should not be considered interchangeable, as they are distinct beverages. Vodka is a relatively straightforward spirit that originated in Russia and Poland, typically distilled to about 40% alcohol by volume (ABV) and characterized by its nearly flavorless profile, aside from a pronounced alcohol kick. This quality makes vodka a versatile mixer for various drinks and dishes. On the other hand, soju is a Korean spirit, generally around 20% ABV, crafted from rice, grains, or potatoes. It is smoother to drink than vodka due to its lower alcohol content, yet it remains similarly mild in flavor. When incorporating these spirits into your broth, you have several options: you can use them as part of a marinade for your chicken or add them to the broth while it simmers. With the milder soju, you can even use it as a finishing touch just before serving.
If these beverages are so "neutral," how do they enhance the flavors in a dish like chicken soup? Spirits such as vodka effectively bond with fat and water molecules, which helps to concentrate and amplify those flavors—specifically, the chicken stock and vegetables in this case. Additionally, since alcohol evaporates more quickly than water, a greater number of these molecules reach your nose sooner, making the soup smell more robust. While many strong liquors can achieve this effect, a spirit with a more pronounced flavor, like bourbon, can impart noticeable tastes to the soup, which may not be desirable.
Alcohol and chicken smells

It is believed that alcohol and vinegar can effectively eliminate strong "meat" odors from chicken, pork, or fish. If you're not fond of the distinct poultry scent that lingers from chicken, broth, or stock in your kitchen, incorporating some liquor may help to reduce it. Chinese rice wine, such as Shaoxing, is commonly used for this purpose, and other rice wines are said to have similar effects. Soju can serve as a substitute for these sweeter, sometimes saltier cooking wines, although the flavor profile differs.
However, it's important to note that adding liquor won't mask the smell of spoiled chicken. Store-bought chicken broth typically lasts only a few days once opened, and raw chicken should be consumed within a day or two. Never consume chicken that has an off odor. While some types of alcohol can be useful for cleaning certain items, they are not a reliable method for eliminating bacteria and cannot salvage spoiled food. When you add soju or vodka, it's solely to enhance the flavor of your chicken soup to gourmet levels.
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