Chill your glass. Pop a flute or coupe in the freezer for 5–10 minutes while you prep.
A cold glass keeps the bubbles lively.
Rim (optional). Run an orange wedge around the rim and dip it in granulated sugar. Tap off the excess for a neat, sparkly edge.
Mix the base. In a shaker filled with ice, add cranberry juice, orange juice, simple syrup, vodka, and orange bitters. Shake for about 10–12 seconds until chilled.
Strain. Strain the mixture into your chilled glass, leaving room for the bubbles.
Add the sparkle. Top with chilled sparkling wine.
Pour gently down the side of the glass to preserve carbonation.
Garnish. Express an orange peel over the top (pinch to release oils) and drop it in. Add a few fresh cranberries for color.
Taste and adjust. If you like it a touch sweeter, add a splash more simple syrup. If you prefer drier, skip the syrup next time.