Combine the whiskey, lemon juice, simple syrup, and egg whites. Pour them into a cocktail shaker (without ice) and do a "dry shake" for a creamy consistency.
Add ice to your shaker and shake again (called a "wet shake") to cool down your cocktail.
Strain your cocktail into a glass. Carefully pour the red wine over the back of a spoon held just above your drink’s surface so it "floats" on top, adding a beautiful layer of color to your Sour.