Domaine AF Gros operates in Beaujolais' Moulin-à-Vent cru, one of the most serious and long-lived Gamay regions in France. The En Mortperay vineyard sits on a steeper parcel within the broader Moulin-à-Vent zone, benefiting from excellent sun exposure and air drainage. Soils here are granitic and mineral-rich, typical of the northern Beaujolais crus, providing excellent structure and ageing potential in Gamay. The 2023 vintage was warm and dry across much of France, with Beaujolais enjoying ripe conditions and moderate yields. Grapes achieved full phenolic maturity whilst retaining natural acidity.

Semi-carbonic maceration, a technique common in Beaujolais, allows partial fermentation within whole berries before crushing, yielding fresh aromatics alongside extraction of colour and tannin. The wine underwent approximately 10–14 days of maceration depending on ripeness, then pressed gently to avoid harsh tannin extraction. Brief aging in neutral vessels or light oak allows the fruit to dominate. The 2023 was bottled relatively early to preserve fresh character typical of young Moulin-à-Vent.