# Steps:
01 - Place two wine glasses in the refrigerator for 10 minutes to properly chill before preparation.
02 - Pour 1.7 fl oz of crème de cassis into each prepared glass.
03 - Add 5.1 fl oz of chilled dry white wine to each glass.
04 - Stir carefully to combine the ingredients without compromising the wine's effervescence.
05 - Include ice cubes if desired for additional chilling.
06 - Top each glass with fresh blackcurrants or a lemon twist and serve immediately.