Grans-Fassian produces Riesling from the Mosel, Germany's steep-slate river valley. The winery's portfolio centers on the region's signature variety, capturing the mineral precision and aromatic intensity that define the terroir. Its top expressions include a Riesling Eiswein—a concentrated dessert wine made from frozen grapes—alongside the Trittenheimer Apotheke Goldkapsel Riesling Spätlese, a late-harvest bottling from a classified vineyard site. The Goldtröpfchen Riesling GG, a dry Grosses Gewächs designation wine, rounds out the core range. These wines have been assessed by Wine Spectator, Wine Enthusiast, Wine Advocate, Falstaff, and Decanter. Mosel Rieslings are known for their balance of fruit sweetness, acidity, and stone-fruit character, often at moderate alcohol levels. Grans-Fassian's focus on single-vineyard and quality-tier expressions reflects the region's tradition of detailed site classification and harvest-based wine styles.