Step 1

Combine white sugar, brown sugar and water in a large saucepan over medium-high heat.  Bring to a boil and boil for 5 minutes.  Stir occasionally and do not allow to boil over (reduce heat if needed).

Step 2

Add instant coffee to sugar syrup while syrup is still hot.  Stir to dissolve.  Let cool.

Step 3

Pour liquid into glass storage jug or container.  Add vodka and vanilla beans.  Let stand in a cool, dark location for 2 weeks before drinking.