Brew your coffee any way you prefer or measure your favorite iced coffee over ice.
Add the amaretto and stir.
Topped with whipped cream (for hot coffee!) and / or a sprinkle of cinnamon, if desired.
Notes
How much sugar you're adding to the coffee will depend on the brand of amaretto you're using, but you can always sweeten your drink more to taste by adding simple syrup.If you need it creamier you can add your favorite coffee creamer.