Combine the first 3 ingredients in a mixing glass. In a second mixing glass, add the milk, then slowly pour the spirits mixture into the milk and allow it to curdle. Delicately stir the mixture without breaking the curds. Allow to sit for 1 hour while the curds settle to the bottom, then slowly strain through a coffee filter. To serve the cocktail, stir 3 oz. of the mixture (per serving) with ice, then strain into a chilled glass and garnish.