There are numerous ways vodka affects the cooking process.
In some recipes, vodka is used to achieve a chemical reaction in a dish. Vodka added to marinades, for example, can help break down tough fibers and tenderize meats. Vodka added to cheese and cream sauces lowers the boiling point to help prevent curdling. It is also very effectively used to deglaze pans during the cooking process in order to dissolve and impart alcohol-soluble flavor compounds to foods or sauces. And sometimes vodka may be added to provide a last minute burst of flavor, to complete the cooking process, or to enhance presentation – as in a flambé.
Thanks for the question.