In a large bowl, combine the cottage cheese, a pinch of salt and egg. Knead until the mixture is smooth and free of lumps.
Then add softened butter to the cottage cheese and mix.
Now sift flour and baking powder into the curd mixture through a sieve. This is necessary so that the flour is saturated with oxygen and the dough rises easily.
Knead the curd dough. As soon as it becomes slightly dense, roll it into a ball. Now put the resulting ball in the refrigerator for about an hour. This will give it more elasticity.
After an hour, take the dough out of the refrigerator and let it sit for 10 minutes until it reaches room temperature. After that, sprinkle the table with flour and start rolling out the dough. The dough should be about 2 cm thick.
Now that the dough is ready, cut out circles of 9-10 cm in diameter. The triangle cookies are served with sugar, so dip one side of each circle in a saucer of sugar and fold it in half so that the sugar side is inside. Then dip one side in sugar again and fold it again with the sugar side inside. The result should be quarters folded in half.
Dip the quarters of the dough in sugar for the third and final time and place them on a baking sheet previously covered with parchment paper. Preheat the oven to 200 degrees and bake for 25 minutes, until golden brown. When the cookies are ready, place them on a plate and let them cool.