Chardonnay wine is probably the most popular white wine in the U.S. The chardonnay grape is used to produced French Champagnes as well as white Burgundy. Chardonnay grapes are planted in many major grape producing countries including Australia, New Zealand, Italy and Spain. In the U.S. Rombauer is considered one of the best Chardonnay wines.
If you don't have Chardonnay, here are some reasonable substitutes: