Fill your mixing glass with a generous amount of ice cubes.
Make sure to use fresh, clean ice for the best flavor.
Pour the rye whiskey and sweet vermouth over the ice.
This combination is the heart of your Manhattan.
Add several dashes of Peychaud bitters to the mix.
This adds depth and complexity to your drink.
Stir the ingredients gently for about 30 seconds.
The goal is to chill the mixture without diluting it too much.
Strain the mixture into a rocks glass over a large ice cube.
This keeps the drink cold yet undiluted as you sip.