2 oz Sláinte Irish Whiskey Smooth Blend
1.5 oz soda
0.5oz simple sugar syrup
0.75oz lemon juice
0.75oz grapefruit juice
1 dash of bitters
Handful of raspberries
Muddle raspberries into a shaker.
Add all other ingredients except club soda to a shaker with ice.
Shake and strain into a Collins glass.
Garnish with a slice of fresh grapefruit.