Pets de sœur, literally nun farts, is a french-canadian dessert that is made from pie dough; often from left over tourtière dough, that is layered with butter, brown sugar and cinnamon, then rolled, sliced, placed in a pan, covered with additional brown sugar, covered in milk, and finally baked. sufficient milk must be added such that it is not dry after the baking. it is called pets de soeur as it was served by nuns at boarding schools in some parts of the province of quebec. if milk is not added, then they should be called nombrils de soldats, literally soldier navels, and not pets de soeurs. they are very similar to cinnamon rolls but are not leavened. in quebec, they are often served ...

Source: Wikipedia