Louis Jadot Montrachet Grand Cru is made from 100 percent Chardonnay. 

Le Montrachet is situated to the south of the Côte de Beaune, on both villages of Puligny Montrachet and Chassagne Montrachet (like the Batard Montrachet Grand Cru).

The terroir is extremely chalky with a lot of stones, perfectly drained and easy to overheat with south-south-eastern exposition.
The Montrachet is produced with Chardonnay

Grapes are harvested by hand and put in small cases in order not to damage the fruits. Grapes are pressed softly, they ferment in oak barrels produced by our cooperage. 1/3 are new barrels. Aging usually lasts 15 months on fine lies before bottling.

Review:

Aromas of buttered toast, honeyed peaches, white flowers and mint introduce the 2019 Montrachet Grand Cru (Maison Louis Jadot), a full-bodied, layered and enveloping wine that's satiny and sumptuous, with lively acids and fine depth at the core. While I'd give the nod to the stunning Demoiselles as Jadot's best white wine this year, this Montrachet—purchased from the Chassagne-Montrachet side, from the house's usual source—is undeniably promising.

-Wine Advocate 94-96 Points