1 oz. OYO Vodka
1 oz. Cointreau (Orange Liqueur)
.25oz Riesling Wine Vinegar (Tavern Vinegar Co)*
Splash of Brut Champagne
Fresh Orange Zest
Mix OYO, Cointreu, and Riesling Vinegar in a Boston Shaker, add ice, shake hard. Pour into chilled champagne flute, top off with chilled Brut Champagne. Garnish with fresh orange zest (or orange twist).
*In a pinch, a high quality white wine vinegar can be subbed, just look for properly “fermented” wine vinegars, as opposed to “distilled” wine vinegars — the difference in complexity and flavor is significant.