By Katie Breidenbach | Catholic News Service

FERDINAND, Ind. -- The aroma of fresh-baked spice cookies fills the monastery bakery in Ferdinand.

The Sisters of St. Benedict claim this scent is truly "heavenly," and with good reason. A saint wrote the recipe.

"It is attributed to St. Hildegard," explained Sister Jean Marie Ballard, manager of the bakery. "She says, if you eat three to five of these cookies on a daily basis, it creates a cheerful countenance, lightens a heavy heart and reduces the effects of aging."

St. Hildegard of Bingen was a Benedictine abbess born in Germany at the end of the 11th century. She penned a recipe for "Cookies of Joy" in her medical work "Physica" sometime between the years 1151 and 1158.

Today, the Ferdinand sisters use that very recipe to create their best-selling product. In the last fiscal year alone, they baked 71,488 of the thin, golden-brown treats and shipped to buyers across the country.

"The Hildegard is one of my favorites. It makes you think of home," said Sister Lynn Marie Falcony, a novice and one of the bakers.

The newest member of the kitchen, postulant Roxanne Higgins, adds, "They're just flavorful because of all the spices, the cinnamon, the cloves, the nuts. It's just a really flavorful cookie."

The sisters sell baked goods to help support 144 community members and a dependent monastery in Peru. The product line includes "Prayerful Pretzels" and eight other kinds of cookies, including shortbread, ginger snap and the "springerle," a traditional German cookie embossed with a design.

Set atop a hill overlooking the small town of Ferdinand, the Monastery of the Sisters of St. Benedict was founded in 1867. The sisters began making Hildegard cookies when they discovered the recipe nearly 20 years ago.

In addition to her cookie, St. Hildegard wrote hundreds of other medicinal remedies. In many, the medieval saint attempts to cure ailments that she believed were caused by man's failure to live in harmony with nature. Her assurance of interdependence predates the "integral ecology" found in Pope Francis' "Laudato Si'" encyclical.

"My background is in chemistry," explained Higgins, "(so) what really strikes me about her is her study of the medicinal properties of herbs and elements."

St. Hildegard also is hailed as a mystic, prophetess, composer, poet and theologian. In 2012, Pope Benedict XVI formally declared Hildegard a saint and named her a doctor of the church. This title, which recognizes that a person contributed significantly to church teaching, has been bestowed on only four women.

"I am inspired by her. She had so many qualities, she had so many gifts. She was just a great woman of the church," said Sister Romaine Kuntz, who has been part of the Indiana monastery for 60 years.

The sisters have made a few changes to the saint's original prescription. "Spelt," an ancient grain common in the Middle Ages, is replaced by a combination of wheat and barley flour. Rather than a rolling pin, they use an electric bakery sheeter that passes the dough beneath a roll bar and presses it to an even thickness.

Though the technology has changed, the Benedictine tradition of prayer remains.

"We try and keep a pretty quiet atmosphere in our bakery so that our work and our prayer meet," Sister Falcony said.

"Like with the sealing, there is a period of time that the sealer has to be on the plastic bag to seal it," said Sister Kuntz, describing the packaging process. "I found out that 'Jesus, Mary and Joseph' is the perfect time for sealing these bags. So each bag gets a prayer of 'Jesus, Mary and Joseph.'"

The sisters made about 4,000 Hildegard cookies leading up to her feast day, Sept. 17. "She had an important message: Take care of yourself," Sister Ballard explained. "It's really hard to serve other people if we're not in good health."

Editor's Note: Hildegard cookies can be ordered via the sisters' website, www.monasterygiftshop.org/bakery.html.