Spice-Infused Sweet Vermouth (Recipe)

House-infused sweet/rosso vermouth steeped with warm spices (cardamom, clove, cinnamon, star anise, etc.). Recipe-side preparation — not a commercial bottling. Layers traditional sweet-vermouth (rosso) bittersweet wormwood/orange profile with concentrated spice. Used in spiced Manhattan and Negroni variants where straight rosso is too one-dimensional. Swap-test: any cardamom/clove/cinnamon infusion on a Dolin/Carpano/Cocchi-style sweet vermouth substitutes cleanly.