Rombauer Vineyards is a 10-acre estate in St. Helena, in the Napa Valley. It was founded in 1980 by Koerner and Joan Rombauer. Koerner was a commercial airline pilot for many years and is also the grand nephew of Irma Rombauer, who in 1936 wrote the Joy of Cooking cookbook, which is still considered a classic cookbook. In 1972 the Rombauers bought 40 acres of hilltop land on the Silverado Trail, establishing the winery eight years later. Today the family still owns and operates the estate, which produces Chardonnay, Zinfandel, Merlot, Cabernet Sauvignon and dessert wines. Rombauer is particularly known for its Chardonnay.