Casmigos Old Manhattan

3 pieces Sugar cubes
3 dashes Angostura Bitters
2 bunches Orange slices
1/2 ounce Crime de cacao
3/4 ounce Sweet vermouth
5 ounces Casamigos Anejo Tequila (aged)
1 cup Ice
1 ounce Jack Rudy Cocktail Company Tonic
(A non carbonated tonic typically added to a gin and tonic with the addition of soda water for the fizz. A terrific add in for this new classic. )