A Rosita is a Negroni-style cocktail built on agave spirits and split vermouth. It keeps the bitter backbone of a Negroni, but trades gin for tequila, and balances the sweetness by using both sweet and dry vermouth. The result is bitter, aromatic, and usually drier on the finish than a classic Negroni. Some menus label it a “mezcal Negroni.” The traditional Rosita is tequila-forward. Mezcal is optional, used either as a split base or as a full substitute. The important part

Foam is not just decoration. Done well, it adds aroma at the rim, changes mouthfeel, and can rebalance a drink by softening sharp edges or carrying a top-note flavor into every sip. Done poorly, it collapses fast, tastes “eggy” or bitter, and makes service inconsistent. This guide explains what cocktail foam is, why it forms, the main foam styles used in bars, and how to make foam reliable in real service. It is technique-only and focuses on stability, workflow, and troubles