Shake, strain, straight up, cocktail glass, garnish
To make blood orange syrup: Mix 2 cups blood orange juice, 6 tablespoons sugar, and 1 tablespoon grated blood orange peel. Stir all ingredients in heavy saucepan over medium heat until sugar dissolves. Increase heat and boil until syrup is reduced to 1 cup, about 20 minutes. Refrigerate. Use within a few days of making.
This drink was inspired by the Caesar (bourbon and Campari). An earlier version included blood orange juice and grenadine, but the substitution of blood orange syrup provides the necessary sweetness and eliminates the need for grenadine.