To get the best results for this cocktail put the Guinness, Coffee Liqueur and Sherry in your fridge for 30 minutes ahead of time.
Prepare the Heavy Cream buy adding about 1/2 cup to a mason jar with the vanilla and shaking vigorously until it reaches a thick pour-able consistency that is NOT solid like typical whipped cream
Add the Bitters, Sherry, and Coffee Liqueur to a chilled glass (fairly large) then top with the Guinness leaving about 1/2 an inch of space.
Now slowly pour heavy cream so that it floats on top of the drink.
Express the oils of the orange peel over the finished drink and discard.