Starbucks uses liquid cane sugar in their Iced Royal English Breakfast Tea Latte, and you can also make your own simple syrup, but it is faster to dissolve white granulated sugar and turbinado sugar for this recipe. The turbinado sugar is a dark brown sugar with a pronounced cane sugar flavor, and the granulated sugar is sweeter, so the flavors in this drink will be the same as at Starbucks.