
Sauvignon blanc is a dry white wine from the green-skinned Sauvignon blanc grape, with bright acidity and a grassy-citrus aroma.
A dry white with high acidity fills the same slot; what changes is the aroma, and this grape is unusually loud about it. In a spritz that matters less than the acidity, and in a wine-forward drink it matters most.
Fumé Blanc
Fumé blanc is not a separate grape or class but the same sauvignon blanc, historically an oak-aged style sold under another name. The label points to a stylistic choice, usually oak, so the wine reads rounder and less green in a spritz or a wine cocktail.
The same grape goes into the sweet wines of Sauternes and Barsac, and fumé blanc is that grape again, oak-aged for a smoky note.
Once opened, wine oxidizes — refrigerate and use within 2–3 days.