Prepare the Mango Puree: In a blender, combine the mango chunks with a small amount of water and blend until smooth. You need enough puree to fill about half a cup.

Mix the Cocktail: In a shaker, add the mango puree, bourbon or whiskey, lemon juice, simple syrup, bitters, and egg white.

Dry Shake: First, shake the mixture without ice. This is to help the egg white become frothy and mix well with the other ingredients.

Add Ice: After the initial shake, add a handful of ice to the shaker.

Shake Again: Shake the mixture vigorously with the ice. This will chill the drink and ensure everything is well combined.

Strain and Serve: Strain the drink into a glass. Some people prefer using a fine mesh to make sure no ice or mango fibers end up in the drink.

Garnish (optional): You can garnish with a slice of mango or a twist of lemon peel for an extra touch.