Fill a cocktail shaker with ice. Add vodka, coffee liqueur, caramel syrup (or toffee liqueur), espresso, and optional chocolate liqueur. Shake hard for 20 seconds until well-chilled and frothy. Strain into a chilled coupe or martini glass. Garnish with a mini Curly Wurly draped across the rim or rested on top, and dust lightly with cocoa powder or grated chocolate.
