Chill the champagne flutes in the freezer for 10 minutes.
Pour the elderflower liqueur into the chilled flute.
Add the fresh orange juice.
Fill the glass with prosecco or champagne, pouring slowly at an angle to maintain bubbles.
Then, gently stir with a bar spoon to combine ingredients.
Garnish with fresh berries and an orange slice.
Notes
Keep ingredients cold before mixing for the best results.The drink stays fizzy longer when using chilled components.Fresh-squeezed orange juice makes a big difference in taste compared to store-bought.This recipe makes one serving. To make a pitcher, multiply ingredients by the number of servings needed.Store leftover prosecco or champagne with a champagne stopper in the fridge for up to 24 hours.