Mastrojanni produces Brunello di Montalcino in central Tuscany, the region's most prestigious expression of Sangiovese. The winery's portfolio centers on single-vineyard bottlings that reflect the terroir of Montalcino's hillsides. Vigna Loreto Brunello di Montalcino and Vigna Schiena d'Asino Brunello di Montalcino represent the winery's commitment to vineyard-specific character, each drawing from distinct microclimates within the appellation. A Brunello di Montalcino Riserva rounds out the core range, offering extended aging potential. Sangiovese at this level demands structure, acidity, and the ability to evolve over decades—qualities inherent to the variety and the Montalcino terroir. The wines have been assessed by Wine Spectator, Wine Advocate, Wine Enthusiast, Falstaff, and Decanter, reflecting their standing within the international fine wine market.