PARIS (AP) — French pastries and butter have become so popular abroad that the increased demand led to a mini shortage of the dairy product in French supermarkets.

The price of butter has risen 60 percent in a year to reach 6.7 euros ($7.90) per kilogram in August, according to official data, creating problems for pastry exporters and fears of a shortage in France of Christmas delicacies such as the traditional Yule Log dessert.

French regions like Brittany and Normandy have reportedly been hit hardest by the butter shortage, which is also linked to a drop in milk supply in Europe.