Wow! This was the innagural cocktail for the first real mixing glass I own. My sister was kind enough to supply the Whistle Pig as a Christmas gift and it gives the Big in Big Boss.
Of all the Godfather cocktails, I think I like this one best. I did not have the vanilla bitters, but, as there was an orange peel garnish, use some orange bitters. Not sure how much it changed from the original, but this was great.