butter room temperature, beat until white with powdered sugar. continuing to whisk pour in the whites,continue whisking for 5 minutes. then add the sifted flour and whisk until smooth, it turns out very tender dough. baking tray lay a baking paper, in a pastry bag with a nozzle for the flower, we collect the dough and press out on a baking tray, doing in the middle of the hole. the middle to fill with jam. preheat the oven to 175С, and bake for 10 minutes, no more. enjoy your tea!