Gather the ingredients.
Muddle 4 basil leaves, lemon juice, and simple syrup in the bottom of a mixing glass.
Add the gin, elderflower liqueur, and bitters . Fill with ice .
Shake for 10 to 12 seconds, then strain into a chilled cocktail glass .
To garnish, roll up the extra basil leaf, wrap the orange twist around it, and place it inside the glass. Serve and enjoy.
