Citrus sourness mellowed by a touch of sugar and invigorated by a blast of toasty bourbon whiskey.
Many assert a classic "Golden Ratio" for all sours...
Happy National Whiskey Sour Day! Like you, Shane, I didn't use a full portion of egg white. Next time I'll use half or less to cut down on the froth. I don't think the taste suffers at all from less egg white.