This is tasty.
2 oz Bourbon (Bulleit)
1/2 oz Sweet Vermouth
1/2 oz Benedictine
2 dashes bitters
Add all except the lemon twist to a pitcher or shaker with ice. Stir and strain into cocktail glass and add lemon twist. For a rocks version, just build in a rocks glass with ice and add garnish.
I found this at Cocktail Times – unfortunately the site does not seem to be fully maintained.
Manhattany at heart, but the botanicals from the Benedictine and the citrus from the twist make this quite crisp and refreshing. Just the right amount of complexity and heartiness.