Make simple syrup: add equal amounts of granulated sugar and water into a small saucepan (for example 1/4 cup sugar and 1/4 cup water). Heat the mixture until the sugar is dissolved. Cool the syrup.
Measure out all the ingredients and add to a shaker.
Add ice cubes. Close the shaker and shake intensely for 10-20 seconds.
Strain into a martini or cocktail glass.
Enjoy!