Rinse cherries well and remove stems. Pit cherries if desired.
Heat vodka and sugar in microwave one minute at a time. Stir and heat until sugar is dissolved.
Fill mason jars with cherries ensuring cherries will be covered with the syrup. Leave at least ¼" head space at top of the jar.
Pour syrup over the cherries and close up jars. Ensure cherries are submerged in the syrup. Store in a cool, dark place (like a fridge or root cellar) for at least 4 months and up to a year if consistently cold.
Serve over ice cream, as garnish for cakes, crepes or drinks.
Notes
You can substitute Brandy for the Vodka if you like but you will have a very different flavour, not as neutral.