Oxidation process, and this process produces the distinctive reddish-brown color of rooibos and enhances the flavor. It has a natural sweetness, with an earthy and rich flavor. Rooibos Tea is commonly prepared in the same manner as black tea, and milk and sugar (or stevia) can be added to taste. Other methods include a slice of lemon and using honey instead of sugar to sweeten. It tastes great both hot and as an iced tea. Caffeine-Free.