Swapping in some fresh-squeezed blood orange juice for a bit of the lime juice gives this margarita a distinctive sweet-tart taste and punchy crimson color. Blood oranges start popping up at markets in December, providing the perfect excuse to shake up a margarita in the dead of winter.
1/4 ouncetriple sec orange liqueur, preferably Luxardo Triplum or Cointreau
Pour enough salt on a small plate to just cover it.
Rub the lime wedge on the outside rim of a cocktail glass; set the lime aside. Holding the glass at a 45-degree angle, dip the rim in the salt, rotating the glass until the entire rim is coated. (Avoid getting any salt inside the glass.) Set the glass aside.
Place the remaining measured ingredients in a cocktail shaker. Fill the shaker halfway with ice and shake vigorously until the outside is frosty, about 20 seconds.
Strain into the prepared glass and garnish with the reserved lime wedge.