The cause was complications of cancer, said his son, George Mesnier.
Mr. Mesnier, whose career started with a $1 per month pastry apprenticeship at 14, was offered the White House job in 1979 after pleasing first lady Rosalynn Carter with his promise that he would focus on lighter dessert fare such as fruit. Indeed, he had a knack for modifying decadent confections with low-calorie ingredient substitutes and, when a luxurious mood prevailed, he proved a master at creating blown and pulled sugar sculptures that adorned his desserts. He showed a whimsical side by making extravagant gingerbread houses for the Christmas season, part of a White House tradition.
His mission, he said, was to comfort a family living under constant scrutiny, to understand its culinary tastes and pleasures. “If I could take away that pressure for five minutes, then I did my job,” he once told the Canadian Press. “That was my role in the White House, to put a smile on the face of the first family.”
A confident and methodical patissier who took as his motto “perfection is no accident,” he tasted every dessert that left his kitchen, carefully inspected finished plates to see what was left untouched, made allies with the White House butler to glean more insights into presidential tastes, and started in June to plan for Christmas.
In interviews and books, he revealed insights into the palate and temperament of presidents and first ladies for whom he worked.
The Carters insisted on adding to the White House menu a molded cheese ring, “a mixture of Muenster, cheddar, all the stickiest cheese you could find, mixed with onions, capers and strawberry jam in the middle” that was “a secret family recipe that no one tried to steal.”
Nor did the Clintons deserve any Michelin stars for their family recipe: “An atrocious concoction of Coca-Cola-flavored jelly served with black glacé cherries.”
The Carters, perhaps surprisingly because of their background farming legumes in their home state of Georgia, “did not care for peanuts at all.”
He would satisfy President Ronald Reagan’s chocolate cravings, routinely denied by the first lady, by preparing a chocolate mousse when the first lady was out of town. Of Nancy Reagan’s tastes, he learned that “if she didn’t complain, that was a compliment.”
On one occasion, Nancy Reagan rejected three different desserts Mr. Mesnier presented to her for a state dinner featuring the queen of the Netherlands. On the Sunday before the Tuesday dinner, she called him back to the White House and gave highly specific instructions: Make 14 sugar baskets that are eight inches in diameter and decorate each handle with six tulips made of sugar before filling the baskets with sorbet and fresh fruit.
“She tilted her head and said, ‘Roland, you have two days and two nights,’ and I said, ‘Thank you, Madam,’” Mr. Mesnier recounted to the New York Times. “It was another test, and you know it makes you strong. Mrs. Reagan pushed me to be who I became.”
Serving politicians and other dignitaries who looked after their appearances, he made healthful modifications to heavy desserts. His apple cider brûlée featured apple cider and cornstarch instead of cream. His soufflés and mousses avoided egg yolks. But like those who employed him, he did not stint on show: He was known for his molded chocolate, made with his own molds, and his sugar work was nonpareil.
Francois Dionot, the founder of the former L’Academie de Cuisine in Bethesda, Md., one of the country’s top cooking schools, described Mr. Mesnier to the Los Angeles Daily News as the “king of sugar work” including “spun sugar, poured sugar, rock sugar, pulled sugar. Very few people know how to do this anymore. He makes roses that look real.”
Mr. Mesnier boasted of never having made a bad dessert at the White House, a skill he attributed to grueling hours and years of training at his craft before stepping foot into 1600 Pennsylvania Avenue. He advised aspiring pastry chefs to relax before they start the cooking process.
“Most people run afoul of baking because they are too uptight when they bake,” he told the Baltimore Sun in 2007. “I used to have a glass of wine before I baked. It worked for me. And if all else fails, just finish the bottle of wine.”
Roland Robert Mesnier was born in Bonnay, in rural eastern France, on July 8, 1944, the seventh of nine siblings. His father worked for the railroad system, and his mother was a homemaker and, by his account, “a wonderful chef.”
He became interested in a culinary career through his older brother Jean, one of the primary bakers in a pastry shop. At 14, Mr. Mesnier began a three-year pastry apprenticeship in Besançon, earning the equivalent of $1 a month. The first year was spent scrubbing floors and washing pots before the chef showed him how to make a croissant. “You never forget when you make your first croissant,” he recalled to the Charlotte Observer.
After his apprenticeship, he worked in pastry shops and hotels in Paris, Hanover and Hamburg in Germany, and in London at the Savoy Hotel, which he identified to the White House Historical Association as “the launchpad to my ambitions and dreams.”
In 1967, Mr. Mesnier became head pastry chef at the Princess Hotel in Bermuda, where he met Martha Whiteford, an American schoolteacher from West Virginia. The two married in 1969 and had one son, George, in 1971. His wife died in January. In addition to his son, of Clearwater, Fla., survivors include two sisters and a brother.
In 1976, Mr. Mesnier left Bermuda for the Homestead resort in Hot Springs, Va., where he worked until he joined the Carter White House kitchen.
After he left the White House during the George W. Bush administration in 2004, he wrote a recipe book and memoir, “All the President’s Pastries,” in 2007 with Christian Malard.
Only once, he recalled to The Washington Post, did he bend firm rules of White House employment. It was in 1987, and the Soviet leader Mikhail Gorbachev visited President Reagan in Washington. Although it is standard that all food gifts sent to the White House be destroyed for security reasons, he could not bring himself to part with two enormous tins of Russian caviar that had come from Gorbachev.
“I looked at the other chef and said, ‘I don’t know about you, buddy, but I’m willing to die for what’s inside,’” he remembered. “‘So I’m taking one home, and you can have the other one.’”