Add the Jameson Irish whiskey, fresh lemon juice, simple syrup, egg white and bitters to a cocktail shaker. Do not add ice yet.
Secure the top on the cocktail shaker and shake it for 30 seconds. This is the dry shake, and it helps create a more stable frothy topping.
Remove the top and add ice to the cocktail shaker. Shake vigorously for one minute. This is the wet shake.
Remove the top from the cocktail shaker. Strain the Irish sour into a serving glass. Bonus points for using a chilled glass to keep the drink extra refreshing.
For an extra pretty touch and delightful fragrance with each sip, add a fresh lemon twist to the side of the serving glass.
When you need some Irish cocktails for your St. Patrick's Day party, don't miss this Jameson whiskey sour recipe. You'll love that Irish spin on a classic cocktail.