Prep Glass: Chill your cocktail glass in the freezer or fill it with ice cubes and let it sit while you prepare the cocktail.
Combine Ingredients: In the mixing glass, pour 1 dash Angostura aromatic bitters, 1 dash Angostura orange bitters, ½ oz sweet Vermouth, ½ oz Yellow Chartreuse, and 2 oz Rye Whiskey.
Stir Well: Fill your mixing glass with ice cubes and, using your bar spoon, stir the ingredients well until the mixture is properly chilled.
Ready Glass: Discard the ice cubes from your cocktail glass or remove it from the freezer, ensuring it's frosty.
Strain: Strain the mixed ingredients into your empty and chilled cocktail glass.
Garnish: Rub a lemon twist around the rim of the glass, twist it over the cocktail to release the oils, and drop it in.