A perfect drink to begin the festivities on Christmas day. Put the Prosecco in the fridge and the vodka in the freezer at least 1 hr ahead.
Fill a jug with ice cubes. Pour in the vodka and elderflower cordial and gently stir to chill.
Strain the liquid into another jug (discarding the ice) and pour into 8 Champagne glasses.
Top up with the Prosecco. Serve.
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