Drew Barrymore and Reese Witherspoon are perfecting their cooking skills on a culinary retreat in Napa Valley, California.

The two pals and mutual stylist friends Leslie Fremar and Gucci Westman have embarked on a top secret all-girl getaway in the heart of California's wine country.

Legally Blonde star Witherspoon couldn't keep the big adventure to herself and posted a photo of the Napa countryside on her Instagram account alongside the caption: "The #girlstrip2014."

Barrymore later posted, "Going to culinary school in napa!"

Reports suggest the girls are taking classes at the Culinary Institute of America.