I have mentioned many times that whiskey sour is one of my favorite cocktails. If I have to drink something at a not-cocktail-bar, then I order a gin tonic to be on the safe side or try to teach them how to make a whiskey sour (yes, I did it several times). This recipe is from the cocktail recipe booklet “passport” by @onurbalk with berry and bergamot touch. I only changed the blackberry syrup with a delicious mixed berry jam I have. By the way, I love to add some fresh orange juice to my whiskey sour.