What does the designation *Blanc de Blancs* typically signify in sparkling wine production, especially in Champagne?

Answer

A wine made only from Chardonnay

Blanc de Blancs translates to 'white from whites' and usually indicates a sparkling wine produced exclusively from white grapes, most commonly Chardonnay in the Champagne region.

What does the designation *Blanc de Blancs* typically signify in sparkling wine production, especially in Champagne?
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