Which grape variety is primarily used in Beaujolais Nouveau?

The grape variety primarily used in Beaujolais Nouveau is Gamay. This specific wine is made using the Gamay grape, known for its light body and fruity character. Beaujolais Nouveau is celebrated for its vibrant flavors of cherries, raspberries, and strawberries, which are typical of the Gamay grape.

Gamay is a key varietal in the Beaujolais region and is particularly esteemed for its ability to produce wines that are fresh and intended for early consumption. The technique of carbonic maceration, often used in the production of Beaujolais Nouveau, enhances the fruitiness and contributes to the wine's bright, approachable profile.

This contrasts with the other grape varieties listed, which are associated with different wine styles and regions. Cabernet Sauvignon and Merlot are both used primarily for producing more robust, full-bodied red wines typically found in regions like Bordeaux, while Sauvignon Blanc is a white grape known for producing crisp and aromatic white wines, particularly in regions like the Loire Valley and New Zealand.