I am looking for a cocktail that uses port, cognac, and curaçao.

It looks like none of the cocktails found in our selection exactly fit the bill of using port, cognac, and curacao all in one drink. However, there are options that come close and might appeal to your taste for rich, layered beverages.

For instance, the Port Flip combines port with cognac, creating a luxurious, frothy cocktail that dates back to the 19th century. If you're open to a slightly adapted experience, the Brandy Liqueur features brandy (which is quite similar to cognac) along with blue curacao, but without the inclusion of port. This mix brings together the bold, smooth flavors of brandy with the citrusy sweetness of orange liqueur and a creamy texture from egg white, providing a well-balanced, indulgent option.

If you're set on having all three specific ingredients, you might need to explore a bit beyond these recommendations or even consider creating your own unique blend. Mixing port, cognac, and curacao could result in a rich, multi-layered cocktail that balances fruity, spicy, and sweet notes, offering a delightful drinking experience. Cheers!