Do you spell champagne with anupper case c?

No, "champagne" is not capitalized unless it's the first word of a sentence or part of a proper noun.

Here's why:

* General rule: Common nouns are not capitalized. Champagne, as a type of sparkling wine, is a common noun.

* Specific region: Champagne is a region in France. The word "Champagne" is capitalized when referring to the specific region (e.g., "The wines of Champagne are renowned").

So, when referring to the sparkling wine, write it as champagne.