15 ml Swedish Tonic
40 ml whiskey
20 ml Cointreau (the whiskey sour is great without Cointreau as well)
20 ml sugar syrup
30 ml lemon juice
1/2 egg white

Step 1
Fill up a short glass with ice.

Step 2
Add all the ingredients to a shaker and shake well.

Step 3
Pour it up to the glass.

The whiskey sour was first mentioned in a Wisconsin newspaper in 1870. 

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