Add all ingredients except ice to the shaker. Close the shaker and hold securely in both hands. Dry shake the ingredients for 10-12 seconds.
Open shaker and add 6-8 ice cubes.
Secure shaker again and shake 10 seconds to chill.
Strain into a martini glass.
Garnish the glass with a wedge of lemon or lemon rind twist.
Notes
Triple Sec can be used in place of Cointreau.
If you are cautious of consuming raw egg, use pasteurized egg white in its place.
For a vegan substitute to the egg whites, try aquafaba.
Depending on your cocktail shaker, the dry shake method can produce pressure inside the shaker which can possibly push the top off. To avoid this, be sure to grasp the shaker firmly with both hands and ensure that the lid is in place well. Then shake straight up and down rather than at a slant for the dry shake.