Fedora Sour

Chill a cocktail coupe in advance to ensure it's perfectly ready for serving.

Prepare a garnish by twisting a piece of lemon zest, setting it aside for later.

Combine the cognac, Adriatico Amaretto liqueur, Lustau San Emilio Pedro Ximénez sherry, freshly squeezed lemon juice, Fee Brothers Peach Bitters, Fee Brothers Black Walnut bitters, and either the pasteurized egg white or Fee Foam in a shaker with ice. Shake thoroughly to blend and chill the mixture.

Strain the mixture back into the shaker, discarding the ice. Perform a dry shake to enhance the cocktail's texture and flavor integration.

Fine strain the cocktail into the pre-chilled coupe glass.

Express the lemon zest twist over the cocktail to release its fragrant oils and place it atop the drink as a garnish.