The class recipe for Limoncello spritz is 3 parts Prosecco, 2 parts Limoncello and 1 part soda water. However, I find this isn’t usually enough volume to fill a large wine glass so I add a little more soda water (plus, extra hydration is never a bad thing!).
I highly recommend adding the mint leaves if you have them – they balance out the citrus flavour perfectly and make this drink somehow even more refreshing!