Take a thin 6 oz. glass and pour 2 ounces of Herbsaint in it. Now fill the glass with the required amount of crushed ice cubes.
Now add 1 / 2 ounce of simple syrup and 2 ounces of carbonated water or club soda into the glass.
Now fill the empty portion of the glass with some more crushed ice.
Now take a stirrer and use it to mix the ingredients.
Take a chilled glass and strain the mixture from thin 6 oz. glass to the the chilled glass.
Remove the ice from the 6 oz. glass and transfer the drink back to it. Your Herbsaint Frappe cocktail is now ready to serve.