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Irish Sour – A Whiskey Cocktail

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Last Updated on March 3, 2021 by

Perfect for St. Patrick’s Day, or anytime, this Irish Sour is one of our great Irish whiskey cocktails!



When Saint Patrick’s Day rolls around everyone wants to be Irish for a day! Our Facebook feeds and Instagram accounts are filled with green clad folks and equally green drinks. While the occasional green drink can be fun (like our Roquette,) for a lot of us we want to celebrate being Irish with something a bit different than your typical green beer!




Irish Sour cocktail with white vermouth bottle, juicer, jigger and straws










Wanting to come up with something different, we thought about a way to use some of the great Irish whiskey that we had. Irish whiskey cocktails are so flavorful and tasty!



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Irish Sour Cocktail in highball with clover leaf straws, jigger, juicer and white vermouth bottle

JIgger / Paper Straws / Citrus Juicer



Irish Sour

A good starting point was the classic whiskey drinks is the Whiskey Sour, a combination of whiskey, lemon juice and sugar that is one of the oldest cocktails around. Wanting to put an Irish twist on the cocktail, we started out with Bushmills Irish Whiskey, a supple rich whiskey that has hints of floral and citrus tang, with a warm toasted note of grain and malted barley.



Distilled since 1608, Bushmills is one of the quintessential Irish whiskeys, making it the perfect way to bring Ireland to the drink. We swapped some of the typical lemon juice for some fresh squeezed grapefruit, which added a slightly bitter sourness to the drink.





What Ingredients are Needed for the Irish Whiskey Cocktails?

  • Orange Bitters
  • Simple Syrup
  • Lemon Juice
  • Grapefruit Juice
  • Maraschino Liqueur
  • White Vermouth
  • Irish Whiskey
  • Club Soda
  • Grenadine




Wanting a bit more depth, we added a bit of Maraschino liqueur which adds a nutty sweetness. We topped the Irish Sour with a float of grenadine to add a bit of color and flavor. If you use real grenadine like we did that doesn’t have a high sugar content, it will sink into the drink, but if you opt for the bright red stuff, it will float on top!




Irish Sour Cocktail in highball with clover leaf straws, jigger, and juicer



While our sour was well on its way, but the balance was a bit off, leaving the drink a bit one note-ish. Wanting a bit more sweet, and while Classic Simple Syrup works, we wanted something that would add sweetness and layers of flavor. We recently had been given a sample of La Quintinye Vermouth Royal Blanc to try out, we thought its flavors of grapefruit, herbs and hay and a woody note that punched up some of the barrels used to age the Irish whiskey.




La Quintinye Vermouth Royal Blanc is a French vermouth, blending fine wines and Pineau des Charentes (a French aperitif fortified wine) from the Cognac region of France.






The vermouth has a beautiful aromatic perfume that complimented the flavors in the Irish Sour and made the drink come alive. If you want another Irish cocktail perfect for St. Patrick’s Day, try our Toasted Cream Irish Coffee!




Like this recipe? Try these below, too!

Savory Irish Stout Hand Pies




The Smoked Cherry - a Bourbon and Brandy cocktail

The Smoked Cherry Cocktail




Other Irish Whisky Cocktails



Also, don’t forget to follow us on Instagram and tag #gastronomcocktails so we can see all the wonderful recipes YOU recreate from this site!



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Irish Sour Cocktail
Yield: 1

Irish Sour - Irish Whiskey Cocktails

Prep Time: 3 minutes
Total Time: 3 minutes

A great alternative to green beer for St. Patrick's Day, this Irish Sour is sure to make your whiskey dreams come true.


  • 2 dashes orange bitters
  • 1/4 oz freshly squeezed lemon juice
  • .50 oz simple syrup
  • 3/4 oz freshly squeezed pink grapefruit juice
  • 1 bar spoon Luxardo Maraschino Liqueur
  • 3/4 oz La Quintinye Vermouth Royal Blanc
  • 2 oz Irish Whiskey
  • 1/4 oz grenadine
  • Dash of club soda


Place the whiskey, vermouth, Luxardo, citrus juices and bitters in a shaker with ice.

Add ice to a Collins glass allowing the glass to chill.

Shake and strain into glass.

Add the dash of club soda.

Add a float of grenadine (if you use real grenadine it will sink, if it's the bright red stuff it will float!)

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 298Total Fat: 0.1gSaturated Fat: 0.1gTrans Fat: 0gUnsaturated Fat: 0gCholesterol: 0mgSodium: 566mgCarbohydrates: 24.8gFiber: 0.3gSugar: 11.6gProtein: 0.2g

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Irish Sour Cocktail in a highball with a 4 leaf clover straw. Juicer and JIgger in background.




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