Prepare your glass by rimming it with sugar. Moisten the rim of the glass with a lemon wedge, then dip it into a small plate filled with sugar, rotating the glass to coat the rim evenly.

Fill a cocktail shaker with ice.

Add Cognac or Brandy, Triple Sec, and freshly squeezed lemon juice to the shaker.

Shake vigorously for about 10-15 seconds to chill the ingredients and combine the flavors.

Strain the mixture into the prepared sugar-rimmed glass.

Optionally, garnish with a lemon twist or a wheel for an elegant touch.