Was shown the light this past New Years and have been enjoying whiskey sours ever since. Keep forgetting the recipe though.
Pour 2 parts bourbon, 1 part fresh lemon juice (or lime in a pinch), ½ part simple syrup, and ½ part egg white in to a shaker and shake for 20-30 seconds. The proteins in the egg generate significant foam and this will add pressure, so hold it tight. Next, add cubed ice and shake hard until very cold. Strain into a tumbler with fresh ice, and garnish with an orange peel twist if you’ve got it.
Note: Aquafaba (the liquid from a can of chickpeas) also works if you don’t want to use egg whites. The egg white from one US large egg is roughly 1 oz, so this is a great cocktail to make in batches of 2.