1 1⁄2 oz Bourbon, Old Forester 100
1⁄4 oz Sweet vermouth
1⁄4 oz Herbal liqueur, Yellow Chartreuse
1⁄4 oz Amontillado Sherry
1⁄8 oz Bénédictine
Add to a shaker, fill with ice, shake vigorously, strain into a chilled coupe glass.
Best I could reverse-engineer from a gastropub located in Lake Charles named Calla.