After making (and enjoying) this cocktail many a time, I dared exploring with a little twist. I have replaced the agave syrup with a mascobado sugar syrup infused with a mix of spices (cinnamon, nutmeg, cloves, cardamon, vanilla, tonka beans). It added a deep layer of complexity and warmth, which definitely worked very well. However, the freshness and perfect balance of the original version is unbeatable.