Chivas 18 Sour
Born in the late 1800s, the Sour was crafted to bridge the gap between older-style punches that were cumbersome and spirit heavy, and the increasingly popular cocktails that comprised increasingly more fancy liqueurs. It's all about the little details.
2 part Chivas Regal 18
1 part freshly squeezed lemon juice
1 part sugar syrup
0.5 part egg white