Black currant shock: Caramelized sugar unlocked cola's hidden twinBlack currant and caramelized sugar create a domestic lemonade concentrate with a distinct cola-like finish. Natalya Guseva, preservation specialist: "It is essential to use a whole cinnamon stick rather than ground powder. During this transition, the remaining sugar, vanilla, and the cinnamon stick are incorporated and boiled for approximately three minutes. Citrus Substitutions: Lemon or lime can replace the orange, though they will increase acidity and lack the specific sweetness of orange zest. Lemon or lime can replace the orange, though they will increase acidity and lack the specific sweetness of orange zest.