Rombauer Vineyards is a well-known winery in Napa Valley, California, founded in 1980 by Koerner and Joan Rombauer. The brand has become a household name, particularly for its distinct style of Chardonnay, which is famous for its rich, buttery, and oak-driven character. While this style has made the brand immensely popular and a consistent bestseller, it has also sparked a debate among wine critics, some of whom prefer a leaner, less-oaked style of Chardonnay.

The winery's philosophy is rooted in a commitment to "The Joy of Wine," a nod to Koerner's great-aunt, Irma Rombauer, the author of the iconic American cookbook, "The Joy of Cooking." This connection underscores the brand's belief that wine should be a source of pleasure, meant to be enjoyed with food and in the company of friends.

Rombauer Vineyards owns and sustainably farms over 830 acres of vineyards across some of California's most esteemed appellations, including Carneros, Atlas Peak, and the Sierra Foothills. While their Chardonnay remains the flagship, the brand also produces highly-regarded Cabernet Sauvignon, Zinfandel, and Sauvignon Blanc. In 2023, the winery was acquired by E. & J. Gallo's Luxury Wine Group, but the brand's new ownership has committed to maintaining the same winemaking team, vineyards, and distinctive style that has made Rombauer an iconic name in the industry.