Things You Will Need
Since the concentrate is quite strong, use it sparingly following separation. With a couple tools and a well-ventilated kitchen, you can separate water from vinegar in a few hours.
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Pour 4 cups of vinegar into a saucepan. Water comprises much of the liquid in standard vinegar.
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Place the pan on the stove at medium high heat, ensuring that windows are open or the stove fan is on to keep the kitchen ventilated.
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Simmer the vinegar until it reduces by three-quarters of its size and becomes thick when stirred with a spoon. This generally takes about 10 to 20 minutes.
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Remove the vinegar from the heat and let it sit until cool.
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Drizzle the vinegar reduction on dishes as a garnish for a variety of foods, or in sauces and marinades.