In a saucepan, pour water and add sugar.
Place the saucepan on medium heat.
Stir until the sugar dissolves.
Take the saucepan off the heat and let it cool down.
Add vanilla extracts and mix well.
Brew coffee and fill it in an ice tray. Freeze for about 40 minutes.
Add frozen coffee into serving glasses. Add ice cubes and pour milk on top.
Pour this vanilla-flavored simple syrup on iced coffee.
Stir and enjoy.