Chill everything: Pop the Prosecco in the fridge for at least 3 hours.
If you have time, chill your glasses too for a crisp, refreshing sip.
Juice the tangerines: Cut them in half and juice them. Strain the juice through a fine sieve if you prefer a smoother drink. Aim for about 2 ounces (60 ml) per serving.
Taste and balance: Sample the juice.
If it’s very tart, stir in 1/4 to 1/2 teaspoon of simple syrup per serving. Keep it subtle—the bubbles and fruit should shine.
Start with juice: Pour 2 ounces (60 ml) of tangerine juice into each flute or coupe. Starting with juice helps the drink mix evenly without losing fizz.
Add the bubbles: Slowly top with 4 ounces (120 ml) chilled Prosecco per glass.
Tilt the glass slightly and pour down the side to preserve the carbonation.
Garnish and serve: Add a thin slice of tangerine or a twist. Serve immediately while cold and bubbly.