Fill the glass most of the way with club soda, about 6-7 ounces.
Pour the half and half over the soda. *You can serve the drink layered like this for a pretty presentation and let whoever is enjoying it stir things up. Or you can stir now to distribute the syrup throughout the drink.
Top with whipped cream and a piece of fresh fruit or a cherry for garnish, if desired. Serve immediately.
Notes
Nutritional information will vary based on the flavor or syrup used if you choose to use the regular or sugar-free variety.