Make a sweet and citrusy sparkling wine using elderflowers, lemon juice, and a few other ingredients. Yields approx. 4.5 liters (152 fl. oz) that is best served chilled on a lovely summer's day. The process of making elderflower champagne begins with picking fresh elderflowers, infusing them in sugar, and then using the sugar to make a sweet liquid that you ferment using sparkling wine or champagne yeast. The black tea in the recipe gives the sparkling wine body and structure and the tea itself cannot be tasted in the final recipe.